Home / 28,251.60-38,939.08-21,443.28

Finding the Fourth Proportional to 28,251.60, 38,939.08 and 21,443.28

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Solution

The fourth proportional to 28,251.60, 38,939.08 and 21,443.28 is: 29,555.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,251.60 : 38,939.08 = 21,443.28 : x
  2. Step 2: Convert to fraction form
    28,251.60/38,939.08 = 21,443.28/x
  3. Step 3: Cross multiply
    28,251.60x = 38,939.08 × 21,443.28
  4. Step 4: Simplify right side
    28,251.60x = 834,981,595.38
  5. Step 5: Solve for x
    x = 834,981,595.38/28,251.60
  6. Step 6: Final answer
    x = 29,555.20

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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.