Home / 13,117.59-18,101.79-7,149.12

Finding the Fourth Proportional to 13,117.59, 18,101.79 and 7,149.12

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Solution

The fourth proportional to 13,117.59, 18,101.79 and 7,149.12 is: 9,865.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,117.59 : 18,101.79 = 7,149.12 : x
  2. Step 2: Convert to fraction form
    13,117.59/18,101.79 = 7,149.12/x
  3. Step 3: Cross multiply
    13,117.59x = 18,101.79 × 7,149.12
  4. Step 4: Simplify right side
    13,117.59x = 129,411,868.92
  5. Step 5: Solve for x
    x = 129,411,868.92/13,117.59
  6. Step 6: Final answer
    x = 9,865.52

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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.