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Finding the Fourth Proportional to 20,934, 28,888.92 and 11,502.63

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Solution

The fourth proportional to 20,934, 28,888.92 and 11,502.63 is: 15,873.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,934 : 28,888.92 = 11,502.63 : x
  2. Step 2: Convert to fraction form
    20,934/28,888.92 = 11,502.63/x
  3. Step 3: Cross multiply
    20,934x = 28,888.92 × 11,502.63
  4. Step 4: Simplify right side
    20,934x = 332,298,557.86
  5. Step 5: Solve for x
    x = 332,298,557.86/20,934
  6. Step 6: Final answer
    x = 15,873.63

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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.