Home / 10,640.42-15,970.46-5,379.12

Finding the Fourth Proportional to 10,640.42, 15,970.46 and 5,379.12

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Solution

The fourth proportional to 10,640.42, 15,970.46 and 5,379.12 is: 8,073.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,640.42 : 15,970.46 = 5,379.12 : x
  2. Step 2: Convert to fraction form
    10,640.42/15,970.46 = 5,379.12/x
  3. Step 3: Cross multiply
    10,640.42x = 15,970.46 × 5,379.12
  4. Step 4: Simplify right side
    10,640.42x = 85,906,993.90
  5. Step 5: Solve for x
    x = 85,906,993.90/10,640.42
  6. Step 6: Final answer
    x = 8,073.65

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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.