Home / 21,185.55-31,781.97-8,712.36

Finding the Fourth Proportional to 21,185.55, 31,781.97 and 8,712.36

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Solution

The fourth proportional to 21,185.55, 31,781.97 and 8,712.36 is: 13,070.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,185.55 : 31,781.97 = 8,712.36 : x
  2. Step 2: Convert to fraction form
    21,185.55/31,781.97 = 8,712.36/x
  3. Step 3: Cross multiply
    21,185.55x = 31,781.97 × 8,712.36
  4. Step 4: Simplify right side
    21,185.55x = 276,895,964.15
  5. Step 5: Solve for x
    x = 276,895,964.15/21,185.55
  6. Step 6: Final answer
    x = 13,070.04

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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.