Home / 5,478-7,560.72-3,120

Finding the Fourth Proportional to 5,478, 7,560.72 and 3,120

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Solution

The fourth proportional to 5,478, 7,560.72 and 3,120 is: 4,306.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478 : 7,560.72 = 3,120 : x
  2. Step 2: Convert to fraction form
    5,478/7,560.72 = 3,120/x
  3. Step 3: Cross multiply
    5,478x = 7,560.72 × 3,120
  4. Step 4: Simplify right side
    5,478x = 23,589,446.40
  5. Step 5: Solve for x
    x = 23,589,446.40/5,478
  6. Step 6: Final answer
    x = 4,306.22

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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.