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Finding the Fourth Proportional to 20,929.92, 28,883.20 and 11,499.08

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Solution

The fourth proportional to 20,929.92, 28,883.20 and 11,499.08 is: 15,868.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.92 : 28,883.20 = 11,499.08 : x
  2. Step 2: Convert to fraction form
    20,929.92/28,883.20 = 11,499.08/x
  3. Step 3: Cross multiply
    20,929.92x = 28,883.20 × 11,499.08
  4. Step 4: Simplify right side
    20,929.92x = 332,130,227.46
  5. Step 5: Solve for x
    x = 332,130,227.46/20,929.92
  6. Step 6: Final answer
    x = 15,868.68

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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.