Home / 13,642.36-20,456.65-5,315.97

Finding the Fourth Proportional to 13,642.36, 20,456.65 and 5,315.97

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Solution

The fourth proportional to 13,642.36, 20,456.65 and 5,315.97 is: 7,971.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,642.36 : 20,456.65 = 5,315.97 : x
  2. Step 2: Convert to fraction form
    13,642.36/20,456.65 = 5,315.97/x
  3. Step 3: Cross multiply
    13,642.36x = 20,456.65 × 5,315.97
  4. Step 4: Simplify right side
    13,642.36x = 108,746,937.70
  5. Step 5: Solve for x
    x = 108,746,937.70/13,642.36
  6. Step 6: Final answer
    x = 7,971.27

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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.