Home / 21,019.57-31,549.04-10,638.61

Finding the Fourth Proportional to 21,019.57, 31,549.04 and 10,638.61

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Solution

The fourth proportional to 21,019.57, 31,549.04 and 10,638.61 is: 15,967.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,019.57 : 31,549.04 = 10,638.61 : x
  2. Step 2: Convert to fraction form
    21,019.57/31,549.04 = 10,638.61/x
  3. Step 3: Cross multiply
    21,019.57x = 31,549.04 × 10,638.61
  4. Step 4: Simplify right side
    21,019.57x = 335,637,932.43
  5. Step 5: Solve for x
    x = 335,637,932.43/21,019.57
  6. Step 6: Final answer
    x = 15,967.88

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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.