Home / 15,514.38-21,409.20-8,440.79

Finding the Fourth Proportional to 15,514.38, 21,409.20 and 8,440.79

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Solution

The fourth proportional to 15,514.38, 21,409.20 and 8,440.79 is: 11,647.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,514.38 : 21,409.20 = 8,440.79 : x
  2. Step 2: Convert to fraction form
    15,514.38/21,409.20 = 8,440.79/x
  3. Step 3: Cross multiply
    15,514.38x = 21,409.20 × 8,440.79
  4. Step 4: Simplify right side
    15,514.38x = 180,710,454.22
  5. Step 5: Solve for x
    x = 180,710,454.22/15,514.38
  6. Step 6: Final answer
    x = 11,647.93

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Half scale
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Double scale
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Similar ratio
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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.