Home / 13,116.69-18,101.24-7,148.36

Finding the Fourth Proportional to 13,116.69, 18,101.24 and 7,148.36

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Solution

The fourth proportional to 13,116.69, 18,101.24 and 7,148.36 is: 9,864.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,116.69 : 18,101.24 = 7,148.36 : x
  2. Step 2: Convert to fraction form
    13,116.69/18,101.24 = 7,148.36/x
  3. Step 3: Cross multiply
    13,116.69x = 18,101.24 × 7,148.36
  4. Step 4: Simplify right side
    13,116.69x = 129,394,179.97
  5. Step 5: Solve for x
    x = 129,394,179.97/13,116.69
  6. Step 6: Final answer
    x = 9,864.85

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Half scale
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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.