Home / 13,129.42-18,118.52-7,161.06

Finding the Fourth Proportional to 13,129.42, 18,118.52 and 7,161.06

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Solution

The fourth proportional to 13,129.42, 18,118.52 and 7,161.06 is: 9,882.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.42 : 18,118.52 = 7,161.06 : x
  2. Step 2: Convert to fraction form
    13,129.42/18,118.52 = 7,161.06/x
  3. Step 3: Cross multiply
    13,129.42x = 18,118.52 × 7,161.06
  4. Step 4: Simplify right side
    13,129.42x = 129,747,808.83
  5. Step 5: Solve for x
    x = 129,747,808.83/13,129.42
  6. Step 6: Final answer
    x = 9,882.22

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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.