Home / 40,821.20-61,217.40-18,645.20

Finding the Fourth Proportional to 40,821.20, 61,217.40 and 18,645.20

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Solution

The fourth proportional to 40,821.20, 61,217.40 and 18,645.20 is: 27,961.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,821.20 : 61,217.40 = 18,645.20 : x
  2. Step 2: Convert to fraction form
    40,821.20/61,217.40 = 18,645.20/x
  3. Step 3: Cross multiply
    40,821.20x = 61,217.40 × 18,645.20
  4. Step 4: Simplify right side
    40,821.20x = 1,141,410,666.48
  5. Step 5: Solve for x
    x = 1,141,410,666.48/40,821.20
  6. Step 6: Final answer
    x = 27,961.22

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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.