Home / 15,401.18-21,115.07-15,120.92

Finding the Fourth Proportional to 15,401.18, 21,115.07 and 15,120.92

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Solution

The fourth proportional to 15,401.18, 21,115.07 and 15,120.92 is: 20,730.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,401.18 : 21,115.07 = 15,120.92 : x
  2. Step 2: Convert to fraction form
    15,401.18/21,115.07 = 15,120.92/x
  3. Step 3: Cross multiply
    15,401.18x = 21,115.07 × 15,120.92
  4. Step 4: Simplify right side
    15,401.18x = 319,279,318.15
  5. Step 5: Solve for x
    x = 319,279,318.15/15,401.18
  6. Step 6: Final answer
    x = 20,730.83

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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 (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.