Home / 9,108.20-13,640.40-5,200.76

Finding the Fourth Proportional to 9,108.20, 13,640.40 and 5,200.76

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Solution

The fourth proportional to 9,108.20, 13,640.40 and 5,200.76 is: 7,788.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,108.20 : 13,640.40 = 5,200.76 : x
  2. Step 2: Convert to fraction form
    9,108.20/13,640.40 = 5,200.76/x
  3. Step 3: Cross multiply
    9,108.20x = 13,640.40 × 5,200.76
  4. Step 4: Simplify right side
    9,108.20x = 70,940,446.70
  5. Step 5: Solve for x
    x = 70,940,446.70/9,108.20
  6. Step 6: Final answer
    x = 7,788.64

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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.