Home / 15,139.26-20,891.86-8,424.74

Finding the Fourth Proportional to 15,139.26, 20,891.86 and 8,424.74

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Solution

The fourth proportional to 15,139.26, 20,891.86 and 8,424.74 is: 11,625.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,139.26 : 20,891.86 = 8,424.74 : x
  2. Step 2: Convert to fraction form
    15,139.26/20,891.86 = 8,424.74/x
  3. Step 3: Cross multiply
    15,139.26x = 20,891.86 × 8,424.74
  4. Step 4: Simplify right side
    15,139.26x = 176,008,488.62
  5. Step 5: Solve for x
    x = 176,008,488.62/15,139.26
  6. Step 6: Final answer
    x = 11,625.96

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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.