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Finding the Fourth Proportional to 8,557.80, 12,836.70 and 8,484.90

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Solution

The fourth proportional to 8,557.80, 12,836.70 and 8,484.90 is: 12,727.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,557.80 : 12,836.70 = 8,484.90 : x
  2. Step 2: Convert to fraction form
    8,557.80/12,836.70 = 8,484.90/x
  3. Step 3: Cross multiply
    8,557.80x = 12,836.70 × 8,484.90
  4. Step 4: Simplify right side
    8,557.80x = 108,918,115.83
  5. Step 5: Solve for x
    x = 108,918,115.83/8,557.80
  6. Step 6: Final answer
    x = 12,727.35

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Half scale
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Double scale
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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.