Home / 15,589.29-21,514.10-8,515.83

Finding the Fourth Proportional to 15,589.29, 21,514.10 and 8,515.83

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Solution

The fourth proportional to 15,589.29, 21,514.10 and 8,515.83 is: 11,752.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,589.29 : 21,514.10 = 8,515.83 : x
  2. Step 2: Convert to fraction form
    15,589.29/21,514.10 = 8,515.83/x
  3. Step 3: Cross multiply
    15,589.29x = 21,514.10 × 8,515.83
  4. Step 4: Simplify right side
    15,589.29x = 183,210,375.62
  5. Step 5: Solve for x
    x = 183,210,375.62/15,589.29
  6. Step 6: Final answer
    x = 11,752.32

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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.