Home / 5,379.20-8,068.80-1,915.52

Finding the Fourth Proportional to 5,379.20, 8,068.80 and 1,915.52

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Solution

The fourth proportional to 5,379.20, 8,068.80 and 1,915.52 is: 2,873.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,379.20 : 8,068.80 = 1,915.52 : x
  2. Step 2: Convert to fraction form
    5,379.20/8,068.80 = 1,915.52/x
  3. Step 3: Cross multiply
    5,379.20x = 8,068.80 × 1,915.52
  4. Step 4: Simplify right side
    5,379.20x = 15,455,947.78
  5. Step 5: Solve for x
    x = 15,455,947.78/5,379.20
  6. Step 6: Final answer
    x = 2,873.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.