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Finding the Fourth Proportional to 39,773.84, 54,888.40 and 21,868.72

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Solution

The fourth proportional to 39,773.84, 54,888.40 and 21,868.72 is: 30,179.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,773.84 : 54,888.40 = 21,868.72 : x
  2. Step 2: Convert to fraction form
    39,773.84/54,888.40 = 21,868.72/x
  3. Step 3: Cross multiply
    39,773.84x = 54,888.40 × 21,868.72
  4. Step 4: Simplify right side
    39,773.84x = 1,200,339,050.85
  5. Step 5: Solve for x
    x = 1,200,339,050.85/39,773.84
  6. Step 6: Final answer
    x = 30,179.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.