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Finding the Fourth Proportional to 14,685.88, 20,257.28 and 8,713.31

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Solution

The fourth proportional to 14,685.88, 20,257.28 and 8,713.31 is: 12,018.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,685.88 : 20,257.28 = 8,713.31 : x
  2. Step 2: Convert to fraction form
    14,685.88/20,257.28 = 8,713.31/x
  3. Step 3: Cross multiply
    14,685.88x = 20,257.28 × 8,713.31
  4. Step 4: Simplify right side
    14,685.88x = 176,508,000.15
  5. Step 5: Solve for x
    x = 176,508,000.15/14,685.88
  6. Step 6: Final answer
    x = 12,018.89

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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.