Home / 13,117.43-18,102.15-7,149.08

Finding the Fourth Proportional to 13,117.43, 18,102.15 and 7,149.08

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Solution

The fourth proportional to 13,117.43, 18,102.15 and 7,149.08 is: 9,865.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,117.43 : 18,102.15 = 7,149.08 : x
  2. Step 2: Convert to fraction form
    13,117.43/18,102.15 = 7,149.08/x
  3. Step 3: Cross multiply
    13,117.43x = 18,102.15 × 7,149.08
  4. Step 4: Simplify right side
    13,117.43x = 129,413,661.95
  5. Step 5: Solve for x
    x = 129,413,661.95/13,117.43
  6. Step 6: Final answer
    x = 9,865.78

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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.