Home / 15,159.67-20,920.05-8,445.85

Finding the Fourth Proportional to 15,159.67, 20,920.05 and 8,445.85

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Solution

The fourth proportional to 15,159.67, 20,920.05 and 8,445.85 is: 11,655.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,159.67 : 20,920.05 = 8,445.85 : x
  2. Step 2: Convert to fraction form
    15,159.67/20,920.05 = 8,445.85/x
  3. Step 3: Cross multiply
    15,159.67x = 20,920.05 × 8,445.85
  4. Step 4: Simplify right side
    15,159.67x = 176,687,604.29
  5. Step 5: Solve for x
    x = 176,687,604.29/15,159.67
  6. Step 6: Final answer
    x = 11,655.11

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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.