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Finding the Fourth Proportional to 8,656,810.60, 12,985,215.90 and 8,326,136.20

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Solution

The fourth proportional to 8,656,810.60, 12,985,215.90 and 8,326,136.20 is: 12,489,204.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,656,810.60 : 12,985,215.90 = 8,326,136.20 : x
  2. Step 2: Convert to fraction form
    8,656,810.60/12,985,215.90 = 8,326,136.20/x
  3. Step 3: Cross multiply
    8,656,810.60x = 12,985,215.90 × 8,326,136.20
  4. Step 4: Simplify right side
    8,656,810.60x = 108,116,676,169,805.58
  5. Step 5: Solve for x
    x = 108,116,676,169,805.58/8,656,810.60
  6. Step 6: Final answer
    x = 12,489,204.30

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Double scale
Find fourth proportional to 8,656,811.60, 12,985,217.40 and 8,326,137.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.