Home / 13,108.13-18,089.42-7,139.79

Finding the Fourth Proportional to 13,108.13, 18,089.42 and 7,139.79

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Solution

The fourth proportional to 13,108.13, 18,089.42 and 7,139.79 is: 9,853.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,108.13 : 18,089.42 = 7,139.79 : x
  2. Step 2: Convert to fraction form
    13,108.13/18,089.42 = 7,139.79/x
  3. Step 3: Cross multiply
    13,108.13x = 18,089.42 × 7,139.79
  4. Step 4: Simplify right side
    13,108.13x = 129,154,660.02
  5. Step 5: Solve for x
    x = 129,154,660.02/13,108.13
  6. Step 6: Final answer
    x = 9,853.02

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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.