Home / 15,113.18-20,854.87-8,398.39

Finding the Fourth Proportional to 15,113.18, 20,854.87 and 8,398.39

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Solution

The fourth proportional to 15,113.18, 20,854.87 and 8,398.39 is: 11,589.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,113.18 : 20,854.87 = 8,398.39 : x
  2. Step 2: Convert to fraction form
    15,113.18/20,854.87 = 8,398.39/x
  3. Step 3: Cross multiply
    15,113.18x = 20,854.87 × 8,398.39
  4. Step 4: Simplify right side
    15,113.18x = 175,147,185.39
  5. Step 5: Solve for x
    x = 175,147,185.39/15,113.18
  6. Step 6: Final answer
    x = 11,589.04

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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.