Home / 20,515.20-30,772.08-6,475.20

Finding the Fourth Proportional to 20,515.20, 30,772.08 and 6,475.20

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Solution

The fourth proportional to 20,515.20, 30,772.08 and 6,475.20 is: 9,712.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.20 : 30,772.08 = 6,475.20 : x
  2. Step 2: Convert to fraction form
    20,515.20/30,772.08 = 6,475.20/x
  3. Step 3: Cross multiply
    20,515.20x = 30,772.08 × 6,475.20
  4. Step 4: Simplify right side
    20,515.20x = 199,255,372.42
  5. Step 5: Solve for x
    x = 199,255,372.42/20,515.20
  6. Step 6: Final answer
    x = 9,712.57

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