Home / 9,143.72-12,618.92-5,163.40

Finding the Fourth Proportional to 9,143.72, 12,618.92 and 5,163.40

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Solution

The fourth proportional to 9,143.72, 12,618.92 and 5,163.40 is: 7,125.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,143.72 : 12,618.92 = 5,163.40 : x
  2. Step 2: Convert to fraction form
    9,143.72/12,618.92 = 5,163.40/x
  3. Step 3: Cross multiply
    9,143.72x = 12,618.92 × 5,163.40
  4. Step 4: Simplify right side
    9,143.72x = 65,156,531.53
  5. Step 5: Solve for x
    x = 65,156,531.53/9,143.72
  6. Step 6: Final answer
    x = 7,125.82

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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.