Home / 15,113.18-20,854.86-8,398.38

Finding the Fourth Proportional to 15,113.18, 20,854.86 and 8,398.38

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Solution

The fourth proportional to 15,113.18, 20,854.86 and 8,398.38 is: 11,589.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,113.18 : 20,854.86 = 8,398.38 : x
  2. Step 2: Convert to fraction form
    15,113.18/20,854.86 = 8,398.38/x
  3. Step 3: Cross multiply
    15,113.18x = 20,854.86 × 8,398.38
  4. Step 4: Simplify right side
    15,113.18x = 175,147,039.13
  5. Step 5: Solve for x
    x = 175,147,039.13/15,113.18
  6. Step 6: Final answer
    x = 11,589.03

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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.