Home / 21,104.74-31,668.12-15,309.20

Finding the Fourth Proportional to 21,104.74, 31,668.12 and 15,309.20

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Solution

The fourth proportional to 21,104.74, 31,668.12 and 15,309.20 is: 22,971.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,104.74 : 31,668.12 = 15,309.20 : x
  2. Step 2: Convert to fraction form
    21,104.74/31,668.12 = 15,309.20/x
  3. Step 3: Cross multiply
    21,104.74x = 31,668.12 × 15,309.20
  4. Step 4: Simplify right side
    21,104.74x = 484,813,582.70
  5. Step 5: Solve for x
    x = 484,813,582.70/21,104.74
  6. Step 6: Final answer
    x = 22,971.79

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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.