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Finding the Fourth Proportional to 14,781.67, 20,398.51 and 8,494.15

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Solution

The fourth proportional to 14,781.67, 20,398.51 and 8,494.15 is: 11,721.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,781.67 : 20,398.51 = 8,494.15 : x
  2. Step 2: Convert to fraction form
    14,781.67/20,398.51 = 8,494.15/x
  3. Step 3: Cross multiply
    14,781.67x = 20,398.51 × 8,494.15
  4. Step 4: Simplify right side
    14,781.67x = 173,268,003.72
  5. Step 5: Solve for x
    x = 173,268,003.72/14,781.67
  6. Step 6: Final answer
    x = 11,721.82

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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.