Home / 8,115.18-12,167.34-2,920.38

Finding the Fourth Proportional to 8,115.18, 12,167.34 and 2,920.38

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Solution

The fourth proportional to 8,115.18, 12,167.34 and 2,920.38 is: 4,378.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,115.18 : 12,167.34 = 2,920.38 : x
  2. Step 2: Convert to fraction form
    8,115.18/12,167.34 = 2,920.38/x
  3. Step 3: Cross multiply
    8,115.18x = 12,167.34 × 2,920.38
  4. Step 4: Simplify right side
    8,115.18x = 35,533,256.39
  5. Step 5: Solve for x
    x = 35,533,256.39/8,115.18
  6. Step 6: Final answer
    x = 4,378.62

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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.