Home / 20,515.25-30,775.85-6,470.53

Finding the Fourth Proportional to 20,515.25, 30,775.85 and 6,470.53

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Solution

The fourth proportional to 20,515.25, 30,775.85 and 6,470.53 is: 9,706.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.25 : 30,775.85 = 6,470.53 : x
  2. Step 2: Convert to fraction form
    20,515.25/30,775.85 = 6,470.53/x
  3. Step 3: Cross multiply
    20,515.25x = 30,775.85 × 6,470.53
  4. Step 4: Simplify right side
    20,515.25x = 199,136,060.70
  5. Step 5: Solve for x
    x = 199,136,060.70/20,515.25
  6. Step 6: Final answer
    x = 9,706.73

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1.5x scale

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.