Home / 9,138.24-12,611.55-5,160.30

Finding the Fourth Proportional to 9,138.24, 12,611.55 and 5,160.30

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Solution

The fourth proportional to 9,138.24, 12,611.55 and 5,160.30 is: 7,121.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.24 : 12,611.55 = 5,160.30 : x
  2. Step 2: Convert to fraction form
    9,138.24/12,611.55 = 5,160.30/x
  3. Step 3: Cross multiply
    9,138.24x = 12,611.55 × 5,160.30
  4. Step 4: Simplify right side
    9,138.24x = 65,079,381.47
  5. Step 5: Solve for x
    x = 65,079,381.47/9,138.24
  6. Step 6: Final answer
    x = 7,121.65

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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.