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Finding the Fourth Proportional to 15,472.50, 21,332.10 and 12,636.90

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Solution

The fourth proportional to 15,472.50, 21,332.10 and 12,636.90 is: 17,422.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,472.50 : 21,332.10 = 12,636.90 : x
  2. Step 2: Convert to fraction form
    15,472.50/21,332.10 = 12,636.90/x
  3. Step 3: Cross multiply
    15,472.50x = 21,332.10 × 12,636.90
  4. Step 4: Simplify right side
    15,472.50x = 269,571,614.49
  5. Step 5: Solve for x
    x = 269,571,614.49/15,472.50
  6. Step 6: Final answer
    x = 17,422.63

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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.