Home / 13,126.28-18,105-7,817

Finding the Fourth Proportional to 13,126.28, 18,105 and 7,817

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Solution

The fourth proportional to 13,126.28, 18,105 and 7,817 is: 10,781.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.28 : 18,105 = 7,817 : x
  2. Step 2: Convert to fraction form
    13,126.28/18,105 = 7,817/x
  3. Step 3: Cross multiply
    13,126.28x = 18,105 × 7,817
  4. Step 4: Simplify right side
    13,126.28x = 141,526,785
  5. Step 5: Solve for x
    x = 141,526,785/13,126.28
  6. Step 6: Final answer
    x = 10,781.94

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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.