Home / 27,781.30-41,642.79-19,985.86

Finding the Fourth Proportional to 27,781.30, 41,642.79 and 19,985.86

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Solution

The fourth proportional to 27,781.30, 41,642.79 and 19,985.86 is: 29,957.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,781.30 : 41,642.79 = 19,985.86 : x
  2. Step 2: Convert to fraction form
    27,781.30/41,642.79 = 19,985.86/x
  3. Step 3: Cross multiply
    27,781.30x = 41,642.79 × 19,985.86
  4. Step 4: Simplify right side
    27,781.30x = 832,266,970.95
  5. Step 5: Solve for x
    x = 832,266,970.95/27,781.30
  6. Step 6: Final answer
    x = 29,957.81

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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.