Home / 20,336.92-28,065.18-11,385.28

Finding the Fourth Proportional to 20,336.92, 28,065.18 and 11,385.28

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Solution

The fourth proportional to 20,336.92, 28,065.18 and 11,385.28 is: 15,711.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,336.92 : 28,065.18 = 11,385.28 : x
  2. Step 2: Convert to fraction form
    20,336.92/28,065.18 = 11,385.28/x
  3. Step 3: Cross multiply
    20,336.92x = 28,065.18 × 11,385.28
  4. Step 4: Simplify right side
    20,336.92x = 319,529,932.55
  5. Step 5: Solve for x
    x = 319,529,932.55/20,336.92
  6. Step 6: Final answer
    x = 15,711.82

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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.