Home / 15,279.05-21,086.10-8,565.12

Finding the Fourth Proportional to 15,279.05, 21,086.10 and 8,565.12

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Solution

The fourth proportional to 15,279.05, 21,086.10 and 8,565.12 is: 11,820.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,279.05 : 21,086.10 = 8,565.12 : x
  2. Step 2: Convert to fraction form
    15,279.05/21,086.10 = 8,565.12/x
  3. Step 3: Cross multiply
    15,279.05x = 21,086.10 × 8,565.12
  4. Step 4: Simplify right side
    15,279.05x = 180,604,976.83
  5. Step 5: Solve for x
    x = 180,604,976.83/15,279.05
  6. Step 6: Final answer
    x = 11,820.43

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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.