Home / 21,537.40-29,721.78-13,036.72

Finding the Fourth Proportional to 21,537.40, 29,721.78 and 13,036.72

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Solution

The fourth proportional to 21,537.40, 29,721.78 and 13,036.72 is: 17,990.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,537.40 : 29,721.78 = 13,036.72 : x
  2. Step 2: Convert to fraction form
    21,537.40/29,721.78 = 13,036.72/x
  3. Step 3: Cross multiply
    21,537.40x = 29,721.78 × 13,036.72
  4. Step 4: Simplify right side
    21,537.40x = 387,474,523.76
  5. Step 5: Solve for x
    x = 387,474,523.76/21,537.40
  6. Step 6: Final answer
    x = 17,990.78

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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.