Home / 13,129.64-18,119.10-7,161.29

Finding the Fourth Proportional to 13,129.64, 18,119.10 and 7,161.29

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Solution

The fourth proportional to 13,129.64, 18,119.10 and 7,161.29 is: 9,882.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.64 : 18,119.10 = 7,161.29 : x
  2. Step 2: Convert to fraction form
    13,129.64/18,119.10 = 7,161.29/x
  3. Step 3: Cross multiply
    13,129.64x = 18,119.10 × 7,161.29
  4. Step 4: Simplify right side
    13,129.64x = 129,756,129.64
  5. Step 5: Solve for x
    x = 129,756,129.64/13,129.64
  6. Step 6: Final answer
    x = 9,882.69

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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.