Home / 15,436.44-21,301.92-8,721

Finding the Fourth Proportional to 15,436.44, 21,301.92 and 8,721

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Solution

The fourth proportional to 15,436.44, 21,301.92 and 8,721 is: 12,034.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,436.44 : 21,301.92 = 8,721 : x
  2. Step 2: Convert to fraction form
    15,436.44/21,301.92 = 8,721/x
  3. Step 3: Cross multiply
    15,436.44x = 21,301.92 × 8,721
  4. Step 4: Simplify right side
    15,436.44x = 185,774,044.32
  5. Step 5: Solve for x
    x = 185,774,044.32/15,436.44
  6. Step 6: Final answer
    x = 12,034.77

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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.