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Finding the Fourth Proportional to 14,781, 20,397.48 and 8,066.61

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Solution

The fourth proportional to 14,781, 20,397.48 and 8,066.61 is: 11,131.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,781 : 20,397.48 = 8,066.61 : x
  2. Step 2: Convert to fraction form
    14,781/20,397.48 = 8,066.61/x
  3. Step 3: Cross multiply
    14,781x = 20,397.48 × 8,066.61
  4. Step 4: Simplify right side
    14,781x = 164,538,516.14
  5. Step 5: Solve for x
    x = 164,538,516.14/14,781
  6. Step 6: Final answer
    x = 11,131.76

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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.