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Finding the Fourth Proportional to 20,881.57, 28,797 and 16,646.68

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Solution

The fourth proportional to 20,881.57, 28,797 and 16,646.68 is: 22,956.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.57 : 28,797 = 16,646.68 : x
  2. Step 2: Convert to fraction form
    20,881.57/28,797 = 16,646.68/x
  3. Step 3: Cross multiply
    20,881.57x = 28,797 × 16,646.68
  4. Step 4: Simplify right side
    20,881.57x = 479,374,443.96
  5. Step 5: Solve for x
    x = 479,374,443.96/20,881.57
  6. Step 6: Final answer
    x = 22,956.82

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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.