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Finding the Fourth Proportional to 15,454.71, 21,327.48 and 8,381.12

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Solution

The fourth proportional to 15,454.71, 21,327.48 and 8,381.12 is: 11,565.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,454.71 : 21,327.48 = 8,381.12 : x
  2. Step 2: Convert to fraction form
    15,454.71/21,327.48 = 8,381.12/x
  3. Step 3: Cross multiply
    15,454.71x = 21,327.48 × 8,381.12
  4. Step 4: Simplify right side
    15,454.71x = 178,748,169.18
  5. Step 5: Solve for x
    x = 178,748,169.18/15,454.71
  6. Step 6: Final answer
    x = 11,565.93

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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.