Home / 20,932.75-28,887.20-11,501.92

Finding the Fourth Proportional to 20,932.75, 28,887.20 and 11,501.92

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Solution

The fourth proportional to 20,932.75, 28,887.20 and 11,501.92 is: 15,872.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,932.75 : 28,887.20 = 11,501.92 : x
  2. Step 2: Convert to fraction form
    20,932.75/28,887.20 = 11,501.92/x
  3. Step 3: Cross multiply
    20,932.75x = 28,887.20 × 11,501.92
  4. Step 4: Simplify right side
    20,932.75x = 332,258,263.42
  5. Step 5: Solve for x
    x = 332,258,263.42/20,932.75
  6. Step 6: Final answer
    x = 15,872.65

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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.