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Finding the Fourth Proportional to 39,672.95, 54,750.20 and 21,768.71

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Solution

The fourth proportional to 39,672.95, 54,750.20 and 21,768.71 is: 30,041.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,672.95 : 54,750.20 = 21,768.71 : x
  2. Step 2: Convert to fraction form
    39,672.95/54,750.20 = 21,768.71/x
  3. Step 3: Cross multiply
    39,672.95x = 54,750.20 × 21,768.71
  4. Step 4: Simplify right side
    39,672.95x = 1,191,840,843.65
  5. Step 5: Solve for x
    x = 1,191,840,843.65/39,672.95
  6. Step 6: Final answer
    x = 30,041.65

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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.