Home / 28,426.10-39,228.17-15,679.73

Finding the Fourth Proportional to 28,426.10, 39,228.17 and 15,679.73

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Solution

The fourth proportional to 28,426.10, 39,228.17 and 15,679.73 is: 21,638.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,426.10 : 39,228.17 = 15,679.73 : x
  2. Step 2: Convert to fraction form
    28,426.10/39,228.17 = 15,679.73/x
  3. Step 3: Cross multiply
    28,426.10x = 39,228.17 × 15,679.73
  4. Step 4: Simplify right side
    28,426.10x = 615,086,839.45
  5. Step 5: Solve for x
    x = 615,086,839.45/28,426.10
  6. Step 6: Final answer
    x = 21,638.11

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Half scale
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Double scale
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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.