Home / 13,116.52-18,100.12-7,147.80

Finding the Fourth Proportional to 13,116.52, 18,100.12 and 7,147.80

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Solution

The fourth proportional to 13,116.52, 18,100.12 and 7,147.80 is: 9,863.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,116.52 : 18,100.12 = 7,147.80 : x
  2. Step 2: Convert to fraction form
    13,116.52/18,100.12 = 7,147.80/x
  3. Step 3: Cross multiply
    13,116.52x = 18,100.12 × 7,147.80
  4. Step 4: Simplify right side
    13,116.52x = 129,376,037.74
  5. Step 5: Solve for x
    x = 129,376,037.74/13,116.52
  6. Step 6: Final answer
    x = 9,863.59

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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.