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Finding the Fourth Proportional to 39,563.72, 54,597.84 and 21,658.72

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Solution

The fourth proportional to 39,563.72, 54,597.84 and 21,658.72 is: 29,888.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,563.72 : 54,597.84 = 21,658.72 : x
  2. Step 2: Convert to fraction form
    39,563.72/54,597.84 = 21,658.72/x
  3. Step 3: Cross multiply
    39,563.72x = 54,597.84 × 21,658.72
  4. Step 4: Simplify right side
    39,563.72x = 1,182,519,329.16
  5. Step 5: Solve for x
    x = 1,182,519,329.16/39,563.72
  6. Step 6: Final answer
    x = 29,888.98

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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.