Home / 13,118.04-18,103.10-7,149.70

Finding the Fourth Proportional to 13,118.04, 18,103.10 and 7,149.70

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Solution

The fourth proportional to 13,118.04, 18,103.10 and 7,149.70 is: 9,866.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.04 : 18,103.10 = 7,149.70 : x
  2. Step 2: Convert to fraction form
    13,118.04/18,103.10 = 7,149.70/x
  3. Step 3: Cross multiply
    13,118.04x = 18,103.10 × 7,149.70
  4. Step 4: Simplify right side
    13,118.04x = 129,431,761.17
  5. Step 5: Solve for x
    x = 129,431,761.17/13,118.04
  6. Step 6: Final answer
    x = 9,866.70

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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.