Home / 13,101.20-18,079.70-7,132.87

Finding the Fourth Proportional to 13,101.20, 18,079.70 and 7,132.87

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Solution

The fourth proportional to 13,101.20, 18,079.70 and 7,132.87 is: 9,843.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,101.20 : 18,079.70 = 7,132.87 : x
  2. Step 2: Convert to fraction form
    13,101.20/18,079.70 = 7,132.87/x
  3. Step 3: Cross multiply
    13,101.20x = 18,079.70 × 7,132.87
  4. Step 4: Simplify right side
    13,101.20x = 128,960,068.88
  5. Step 5: Solve for x
    x = 128,960,068.88/13,101.20
  6. Step 6: Final answer
    x = 9,843.38

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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.