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Finding the Fourth Proportional to 20,876.56, 28,809.90 and 11,444.92

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Solution

The fourth proportional to 20,876.56, 28,809.90 and 11,444.92 is: 15,794.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.56 : 28,809.90 = 11,444.92 : x
  2. Step 2: Convert to fraction form
    20,876.56/28,809.90 = 11,444.92/x
  3. Step 3: Cross multiply
    20,876.56x = 28,809.90 × 11,444.92
  4. Step 4: Simplify right side
    20,876.56x = 329,727,000.71
  5. Step 5: Solve for x
    x = 329,727,000.71/20,876.56
  6. Step 6: Final answer
    x = 15,794.13

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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.