Home / 12,528,098.10-18,792,147.15-7,720,197.30

Finding the Fourth Proportional to 12,528,098.10, 18,792,147.15 and 7,720,197.30

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Solution

The fourth proportional to 12,528,098.10, 18,792,147.15 and 7,720,197.30 is: 11,580,295.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,528,098.10 : 18,792,147.15 = 7,720,197.30 : x
  2. Step 2: Convert to fraction form
    12,528,098.10/18,792,147.15 = 7,720,197.30/x
  3. Step 3: Cross multiply
    12,528,098.10x = 18,792,147.15 × 7,720,197.30
  4. Step 4: Simplify right side
    12,528,098.10x = 145,079,083,688,632.69
  5. Step 5: Solve for x
    x = 145,079,083,688,632.69/12,528,098.10
  6. Step 6: Final answer
    x = 11,580,295.95

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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.