Home / 8,107.20-12,160.80-7,394.40

Finding the Fourth Proportional to 8,107.20, 12,160.80 and 7,394.40

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Solution

The fourth proportional to 8,107.20, 12,160.80 and 7,394.40 is: 11,091.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,107.20 : 12,160.80 = 7,394.40 : x
  2. Step 2: Convert to fraction form
    8,107.20/12,160.80 = 7,394.40/x
  3. Step 3: Cross multiply
    8,107.20x = 12,160.80 × 7,394.40
  4. Step 4: Simplify right side
    8,107.20x = 89,921,819.52
  5. Step 5: Solve for x
    x = 89,921,819.52/8,107.20
  6. Step 6: Final answer
    x = 11,091.60

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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.