Home / 40,987.98-61,484.00-18,791.28

Finding the Fourth Proportional to 40,987.98, 61,484.00 and 18,791.28

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Solution

The fourth proportional to 40,987.98, 61,484.00 and 18,791.28 is: 28,187.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,987.98 : 61,484.00 = 18,791.28 : x
  2. Step 2: Convert to fraction form
    40,987.98/61,484.00 = 18,791.28/x
  3. Step 3: Cross multiply
    40,987.98x = 61,484.00 × 18,791.28
  4. Step 4: Simplify right side
    40,987.98x = 1,155,362,965.56
  5. Step 5: Solve for x
    x = 1,155,362,965.56/40,987.98
  6. Step 6: Final answer
    x = 28,187.85

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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.