Home / 9,138.20-13,718.10-9,073.40

Finding the Fourth Proportional to 9,138.20, 13,718.10 and 9,073.40

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Solution

The fourth proportional to 9,138.20, 13,718.10 and 9,073.40 is: 13,620.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.20 : 13,718.10 = 9,073.40 : x
  2. Step 2: Convert to fraction form
    9,138.20/13,718.10 = 9,073.40/x
  3. Step 3: Cross multiply
    9,138.20x = 13,718.10 × 9,073.40
  4. Step 4: Simplify right side
    9,138.20x = 124,469,808.54
  5. Step 5: Solve for x
    x = 124,469,808.54/9,138.20
  6. Step 6: Final answer
    x = 13,620.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.