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Finding the Fourth Proportional to 28,189.60, 38,892.88 and 16,251.41

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Solution

The fourth proportional to 28,189.60, 38,892.88 and 16,251.41 is: 22,421.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,189.60 : 38,892.88 = 16,251.41 : x
  2. Step 2: Convert to fraction form
    28,189.60/38,892.88 = 16,251.41/x
  3. Step 3: Cross multiply
    28,189.60x = 38,892.88 × 16,251.41
  4. Step 4: Simplify right side
    28,189.60x = 632,064,138.96
  5. Step 5: Solve for x
    x = 632,064,138.96/28,189.60
  6. Step 6: Final answer
    x = 22,421.89

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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.