Home / 13,386.44-18,471.97-7,721.71

Finding the Fourth Proportional to 13,386.44, 18,471.97 and 7,721.71

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Solution

The fourth proportional to 13,386.44, 18,471.97 and 7,721.71 is: 10,655.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,386.44 : 18,471.97 = 7,721.71 : x
  2. Step 2: Convert to fraction form
    13,386.44/18,471.97 = 7,721.71/x
  3. Step 3: Cross multiply
    13,386.44x = 18,471.97 × 7,721.71
  4. Step 4: Simplify right side
    13,386.44x = 142,635,195.47
  5. Step 5: Solve for x
    x = 142,635,195.47/13,386.44
  6. Step 6: Final answer
    x = 10,655.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.