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Finding the Fourth Proportional to 20,781.95, 28,648.71 and 16,534.60

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Solution

The fourth proportional to 20,781.95, 28,648.71 and 16,534.60 is: 22,793.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.95 : 28,648.71 = 16,534.60 : x
  2. Step 2: Convert to fraction form
    20,781.95/28,648.71 = 16,534.60/x
  3. Step 3: Cross multiply
    20,781.95x = 28,648.71 × 16,534.60
  4. Step 4: Simplify right side
    20,781.95x = 473,694,888.74
  5. Step 5: Solve for x
    x = 473,694,888.74/20,781.95
  6. Step 6: Final answer
    x = 22,793.58

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.