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Finding the Fourth Proportional to 20,881, 28,814.82 and 12,502.12

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Solution

The fourth proportional to 20,881, 28,814.82 and 12,502.12 is: 17,252.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881 : 28,814.82 = 12,502.12 : x
  2. Step 2: Convert to fraction form
    20,881/28,814.82 = 12,502.12/x
  3. Step 3: Cross multiply
    20,881x = 28,814.82 × 12,502.12
  4. Step 4: Simplify right side
    20,881x = 360,246,337.42
  5. Step 5: Solve for x
    x = 360,246,337.42/20,881
  6. Step 6: Final answer
    x = 17,252.35

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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.