Home / 13,118.07-18,103.05-7,149.90

Finding the Fourth Proportional to 13,118.07, 18,103.05 and 7,149.90

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Solution

The fourth proportional to 13,118.07, 18,103.05 and 7,149.90 is: 9,866.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.07 : 18,103.05 = 7,149.90 : x
  2. Step 2: Convert to fraction form
    13,118.07/18,103.05 = 7,149.90/x
  3. Step 3: Cross multiply
    13,118.07x = 18,103.05 × 7,149.90
  4. Step 4: Simplify right side
    13,118.07x = 129,434,997.20
  5. Step 5: Solve for x
    x = 129,434,997.20/13,118.07
  6. Step 6: Final answer
    x = 9,866.92

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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.