Home / 8,319.52-12,475.63-3,121.75

Finding the Fourth Proportional to 8,319.52, 12,475.63 and 3,121.75

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Solution

The fourth proportional to 8,319.52, 12,475.63 and 3,121.75 is: 4,681.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,319.52 : 12,475.63 = 3,121.75 : x
  2. Step 2: Convert to fraction form
    8,319.52/12,475.63 = 3,121.75/x
  3. Step 3: Cross multiply
    8,319.52x = 12,475.63 × 3,121.75
  4. Step 4: Simplify right side
    8,319.52x = 38,945,797.95
  5. Step 5: Solve for x
    x = 38,945,797.95/8,319.52
  6. Step 6: Final answer
    x = 4,681.26

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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.