Home / 21,182.61-31,748.25-11,812.66

Finding the Fourth Proportional to 21,182.61, 31,748.25 and 11,812.66

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Solution

The fourth proportional to 21,182.61, 31,748.25 and 11,812.66 is: 17,704.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,182.61 : 31,748.25 = 11,812.66 : x
  2. Step 2: Convert to fraction form
    21,182.61/31,748.25 = 11,812.66/x
  3. Step 3: Cross multiply
    21,182.61x = 31,748.25 × 11,812.66
  4. Step 4: Simplify right side
    21,182.61x = 375,031,282.85
  5. Step 5: Solve for x
    x = 375,031,282.85/21,182.61
  6. Step 6: Final answer
    x = 17,704.68

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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.