Home / 13,130.20-18,119.14-7,161.72

Finding the Fourth Proportional to 13,130.20, 18,119.14 and 7,161.72

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Solution

The fourth proportional to 13,130.20, 18,119.14 and 7,161.72 is: 9,882.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.20 : 18,119.14 = 7,161.72 : x
  2. Step 2: Convert to fraction form
    13,130.20/18,119.14 = 7,161.72/x
  3. Step 3: Cross multiply
    13,130.20x = 18,119.14 × 7,161.72
  4. Step 4: Simplify right side
    13,130.20x = 129,764,207.32
  5. Step 5: Solve for x
    x = 129,764,207.32/13,130.20
  6. Step 6: Final answer
    x = 9,882.88

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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.