Home / 40,872.84-61,278.18-21,138.82

Finding the Fourth Proportional to 40,872.84, 61,278.18 and 21,138.82

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Solution

The fourth proportional to 40,872.84, 61,278.18 and 21,138.82 is: 31,692.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,872.84 : 61,278.18 = 21,138.82 : x
  2. Step 2: Convert to fraction form
    40,872.84/61,278.18 = 21,138.82/x
  3. Step 3: Cross multiply
    40,872.84x = 61,278.18 × 21,138.82
  4. Step 4: Simplify right side
    40,872.84x = 1,295,348,416.95
  5. Step 5: Solve for x
    x = 1,295,348,416.95/40,872.84
  6. Step 6: Final answer
    x = 31,692.16

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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.