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Finding the Fourth Proportional to 15,385.67, 21,227.50 and 9,411.11

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Solution

The fourth proportional to 15,385.67, 21,227.50 and 9,411.11 is: 12,984.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.67 : 21,227.50 = 9,411.11 : x
  2. Step 2: Convert to fraction form
    15,385.67/21,227.50 = 9,411.11/x
  3. Step 3: Cross multiply
    15,385.67x = 21,227.50 × 9,411.11
  4. Step 4: Simplify right side
    15,385.67x = 199,774,337.53
  5. Step 5: Solve for x
    x = 199,774,337.53/15,385.67
  6. Step 6: Final answer
    x = 12,984.44

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.