Home / 39,781.44-59,699.28-21,060.72

Finding the Fourth Proportional to 39,781.44, 59,699.28 and 21,060.72

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Solution

The fourth proportional to 39,781.44, 59,699.28 and 21,060.72 is: 31,605.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,781.44 : 59,699.28 = 21,060.72 : x
  2. Step 2: Convert to fraction form
    39,781.44/59,699.28 = 21,060.72/x
  3. Step 3: Cross multiply
    39,781.44x = 59,699.28 × 21,060.72
  4. Step 4: Simplify right side
    39,781.44x = 1,257,309,820.28
  5. Step 5: Solve for x
    x = 1,257,309,820.28/39,781.44
  6. Step 6: Final answer
    x = 31,605.44

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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.