Home / 13,118.52-18,102.88-7,149.80

Finding the Fourth Proportional to 13,118.52, 18,102.88 and 7,149.80

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Solution

The fourth proportional to 13,118.52, 18,102.88 and 7,149.80 is: 9,866.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.52 : 18,102.88 = 7,149.80 : x
  2. Step 2: Convert to fraction form
    13,118.52/18,102.88 = 7,149.80/x
  3. Step 3: Cross multiply
    13,118.52x = 18,102.88 × 7,149.80
  4. Step 4: Simplify right side
    13,118.52x = 129,431,971.42
  5. Step 5: Solve for x
    x = 129,431,971.42/13,118.52
  6. Step 6: Final answer
    x = 9,866.35

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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.