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Finding the Fourth Proportional to 15,475.71, 21,356.11 and 8,762.99

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Solution

The fourth proportional to 15,475.71, 21,356.11 and 8,762.99 is: 12,092.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,475.71 : 21,356.11 = 8,762.99 : x
  2. Step 2: Convert to fraction form
    15,475.71/21,356.11 = 8,762.99/x
  3. Step 3: Cross multiply
    15,475.71x = 21,356.11 × 8,762.99
  4. Step 4: Simplify right side
    15,475.71x = 187,143,233.25
  5. Step 5: Solve for x
    x = 187,143,233.25/15,475.71
  6. Step 6: Final answer
    x = 12,092.71

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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.