Home / 8,921.48-12,311.37-5,144.66

Finding the Fourth Proportional to 8,921.48, 12,311.37 and 5,144.66

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Solution

The fourth proportional to 8,921.48, 12,311.37 and 5,144.66 is: 7,099.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.48 : 12,311.37 = 5,144.66 : x
  2. Step 2: Convert to fraction form
    8,921.48/12,311.37 = 5,144.66/x
  3. Step 3: Cross multiply
    8,921.48x = 12,311.37 × 5,144.66
  4. Step 4: Simplify right side
    8,921.48x = 63,337,812.78
  5. Step 5: Solve for x
    x = 63,337,812.78/8,921.48
  6. Step 6: Final answer
    x = 7,099.47

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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.