Home / 20,417.28-28,161.12-18,744

Finding the Fourth Proportional to 20,417.28, 28,161.12 and 18,744

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Solution

The fourth proportional to 20,417.28, 28,161.12 and 18,744 is: 25,853.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,417.28 : 28,161.12 = 18,744 : x
  2. Step 2: Convert to fraction form
    20,417.28/28,161.12 = 18,744/x
  3. Step 3: Cross multiply
    20,417.28x = 28,161.12 × 18,744
  4. Step 4: Simplify right side
    20,417.28x = 527,852,033.28
  5. Step 5: Solve for x
    x = 527,852,033.28/20,417.28
  6. Step 6: Final answer
    x = 25,853.20

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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.