Home / 13,108.97-18,089.87-7,140.69

Finding the Fourth Proportional to 13,108.97, 18,089.87 and 7,140.69

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Solution

The fourth proportional to 13,108.97, 18,089.87 and 7,140.69 is: 9,853.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,108.97 : 18,089.87 = 7,140.69 : x
  2. Step 2: Convert to fraction form
    13,108.97/18,089.87 = 7,140.69/x
  3. Step 3: Cross multiply
    13,108.97x = 18,089.87 × 7,140.69
  4. Step 4: Simplify right side
    13,108.97x = 129,174,118.11
  5. Step 5: Solve for x
    x = 129,174,118.11/13,108.97
  6. Step 6: Final answer
    x = 9,853.87

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Double scale
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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.