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Finding the Fourth Proportional to 8,220,673.90, 12,331,010.85 and 8,220,673.90

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Solution

The fourth proportional to 8,220,673.90, 12,331,010.85 and 8,220,673.90 is: 12,331,010.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,220,673.90 : 12,331,010.85 = 8,220,673.90 : x
  2. Step 2: Convert to fraction form
    8,220,673.90/12,331,010.85 = 8,220,673.90/x
  3. Step 3: Cross multiply
    8,220,673.90x = 12,331,010.85 × 8,220,673.90
  4. Step 4: Simplify right side
    8,220,673.90x = 101,369,219,055,211.81
  5. Step 5: Solve for x
    x = 101,369,219,055,211.81/8,220,673.90
  6. Step 6: Final answer
    x = 12,331,010.85

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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.