Home / 20,515.13-30,772.70-6,475.20

Finding the Fourth Proportional to 20,515.13, 30,772.70 and 6,475.20

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Solution

The fourth proportional to 20,515.13, 30,772.70 and 6,475.20 is: 9,712.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.13 : 30,772.70 = 6,475.20 : x
  2. Step 2: Convert to fraction form
    20,515.13/30,772.70 = 6,475.20/x
  3. Step 3: Cross multiply
    20,515.13x = 30,772.70 × 6,475.20
  4. Step 4: Simplify right side
    20,515.13x = 199,259,387.04
  5. Step 5: Solve for x
    x = 199,259,387.04/20,515.13
  6. Step 6: Final answer
    x = 9,712.80

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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.