Home / 13,149.30-18,145.89-7,180.95

Finding the Fourth Proportional to 13,149.30, 18,145.89 and 7,180.95

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Solution

The fourth proportional to 13,149.30, 18,145.89 and 7,180.95 is: 9,909.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149.30 : 18,145.89 = 7,180.95 : x
  2. Step 2: Convert to fraction form
    13,149.30/18,145.89 = 7,180.95/x
  3. Step 3: Cross multiply
    13,149.30x = 18,145.89 × 7,180.95
  4. Step 4: Simplify right side
    13,149.30x = 130,304,728.80
  5. Step 5: Solve for x
    x = 130,304,728.80/13,149.30
  6. Step 6: Final answer
    x = 9,909.63

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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.