Home / 20,515.28-30,772.89-6,476.39

Finding the Fourth Proportional to 20,515.28, 30,772.89 and 6,476.39

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Solution

The fourth proportional to 20,515.28, 30,772.89 and 6,476.39 is: 9,714.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.28 : 30,772.89 = 6,476.39 : x
  2. Step 2: Convert to fraction form
    20,515.28/30,772.89 = 6,476.39/x
  3. Step 3: Cross multiply
    20,515.28x = 30,772.89 × 6,476.39
  4. Step 4: Simplify right side
    20,515.28x = 199,297,083.20
  5. Step 5: Solve for x
    x = 199,297,083.20/20,515.28
  6. Step 6: Final answer
    x = 9,714.57

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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.