Home / 7,989.20-11,022.70-5,158.18

Finding the Fourth Proportional to 7,989.20, 11,022.70 and 5,158.18

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Solution

The fourth proportional to 7,989.20, 11,022.70 and 5,158.18 is: 7,116.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,989.20 : 11,022.70 = 5,158.18 : x
  2. Step 2: Convert to fraction form
    7,989.20/11,022.70 = 5,158.18/x
  3. Step 3: Cross multiply
    7,989.20x = 11,022.70 × 5,158.18
  4. Step 4: Simplify right side
    7,989.20x = 56,856,989.78
  5. Step 5: Solve for x
    x = 56,856,989.78/7,989.20
  6. Step 6: Final answer
    x = 7,116.74

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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.