Home / 13,117.16-18,101.15-7,148.70

Finding the Fourth Proportional to 13,117.16, 18,101.15 and 7,148.70

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Solution

The fourth proportional to 13,117.16, 18,101.15 and 7,148.70 is: 9,864.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,117.16 : 18,101.15 = 7,148.70 : x
  2. Step 2: Convert to fraction form
    13,117.16/18,101.15 = 7,148.70/x
  3. Step 3: Cross multiply
    13,117.16x = 18,101.15 × 7,148.70
  4. Step 4: Simplify right side
    13,117.16x = 129,399,691.01
  5. Step 5: Solve for x
    x = 129,399,691.01/13,117.16
  6. Step 6: Final answer
    x = 9,864.92

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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.