Home / 9,140.26-12,612.84-5,161.78

Finding the Fourth Proportional to 9,140.26, 12,612.84 and 5,161.78

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Solution

The fourth proportional to 9,140.26, 12,612.84 and 5,161.78 is: 7,122.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,140.26 : 12,612.84 = 5,161.78 : x
  2. Step 2: Convert to fraction form
    9,140.26/12,612.84 = 5,161.78/x
  3. Step 3: Cross multiply
    9,140.26x = 12,612.84 × 5,161.78
  4. Step 4: Simplify right side
    9,140.26x = 65,104,705.26
  5. Step 5: Solve for x
    x = 65,104,705.26/9,140.26
  6. Step 6: Final answer
    x = 7,122.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.