Home / 13,147.76-19,731.16-5,143.71

Finding the Fourth Proportional to 13,147.76, 19,731.16 and 5,143.71

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Solution

The fourth proportional to 13,147.76, 19,731.16 and 5,143.71 is: 7,719.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.76 : 19,731.16 = 5,143.71 : x
  2. Step 2: Convert to fraction form
    13,147.76/19,731.16 = 5,143.71/x
  3. Step 3: Cross multiply
    13,147.76x = 19,731.16 × 5,143.71
  4. Step 4: Simplify right side
    13,147.76x = 101,491,365.00
  5. Step 5: Solve for x
    x = 101,491,365.00/13,147.76
  6. Step 6: Final answer
    x = 7,719.29

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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.