Home / 15,514.32-21,409.13-8,440.75

Finding the Fourth Proportional to 15,514.32, 21,409.13 and 8,440.75

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Solution

The fourth proportional to 15,514.32, 21,409.13 and 8,440.75 is: 11,647.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,514.32 : 21,409.13 = 8,440.75 : x
  2. Step 2: Convert to fraction form
    15,514.32/21,409.13 = 8,440.75/x
  3. Step 3: Cross multiply
    15,514.32x = 21,409.13 × 8,440.75
  4. Step 4: Simplify right side
    15,514.32x = 180,708,964.80
  5. Step 5: Solve for x
    x = 180,708,964.80/15,514.32
  6. Step 6: Final answer
    x = 11,647.88

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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.