Home / 21,161.18-31,742.78-17,456.55

Finding the Fourth Proportional to 21,161.18, 31,742.78 and 17,456.55

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Solution

The fourth proportional to 21,161.18, 31,742.78 and 17,456.55 is: 26,185.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.18 : 31,742.78 = 17,456.55 : x
  2. Step 2: Convert to fraction form
    21,161.18/31,742.78 = 17,456.55/x
  3. Step 3: Cross multiply
    21,161.18x = 31,742.78 × 17,456.55
  4. Step 4: Simplify right side
    21,161.18x = 554,119,426.21
  5. Step 5: Solve for x
    x = 554,119,426.21/21,161.18
  6. Step 6: Final answer
    x = 26,185.66

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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.