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Finding the Fourth Proportional to 20,652.75, 28,487.79 and 16,470.99

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Solution

The fourth proportional to 20,652.75, 28,487.79 and 16,470.99 is: 22,719.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,652.75 : 28,487.79 = 16,470.99 : x
  2. Step 2: Convert to fraction form
    20,652.75/28,487.79 = 16,470.99/x
  3. Step 3: Cross multiply
    20,652.75x = 28,487.79 × 16,470.99
  4. Step 4: Simplify right side
    20,652.75x = 469,222,104.21
  5. Step 5: Solve for x
    x = 469,222,104.21/20,652.75
  6. Step 6: Final answer
    x = 22,719.59

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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.