Home / 10,128.74-15,191.15-2,731.32

Finding the Fourth Proportional to 10,128.74, 15,191.15 and 2,731.32

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Solution

The fourth proportional to 10,128.74, 15,191.15 and 2,731.32 is: 4,096.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,128.74 : 15,191.15 = 2,731.32 : x
  2. Step 2: Convert to fraction form
    10,128.74/15,191.15 = 2,731.32/x
  3. Step 3: Cross multiply
    10,128.74x = 15,191.15 × 2,731.32
  4. Step 4: Simplify right side
    10,128.74x = 41,491,878.16
  5. Step 5: Solve for x
    x = 41,491,878.16/10,128.74
  6. Step 6: Final answer
    x = 4,096.45

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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.