Home / 40,878.20-61,317.30-21,162.80

Finding the Fourth Proportional to 40,878.20, 61,317.30 and 21,162.80

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Solution

The fourth proportional to 40,878.20, 61,317.30 and 21,162.80 is: 31,744.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,878.20 : 61,317.30 = 21,162.80 : x
  2. Step 2: Convert to fraction form
    40,878.20/61,317.30 = 21,162.80/x
  3. Step 3: Cross multiply
    40,878.20x = 61,317.30 × 21,162.80
  4. Step 4: Simplify right side
    40,878.20x = 1,297,645,756.44
  5. Step 5: Solve for x
    x = 1,297,645,756.44/40,878.20
  6. Step 6: Final answer
    x = 31,744.20

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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.