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Finding the Fourth Proportional to 20,842.60, 28,732.88 and 14,863.88

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Solution

The fourth proportional to 20,842.60, 28,732.88 and 14,863.88 is: 20,490.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,842.60 : 28,732.88 = 14,863.88 : x
  2. Step 2: Convert to fraction form
    20,842.60/28,732.88 = 14,863.88/x
  3. Step 3: Cross multiply
    20,842.60x = 28,732.88 × 14,863.88
  4. Step 4: Simplify right side
    20,842.60x = 427,082,080.37
  5. Step 5: Solve for x
    x = 427,082,080.37/20,842.60
  6. Step 6: Final answer
    x = 20,490.83

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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.