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Finding the Fourth Proportional to 21,052.80, 29,052 and 13,488.48

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Solution

The fourth proportional to 21,052.80, 29,052 and 13,488.48 is: 18,613.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,052.80 : 29,052 = 13,488.48 : x
  2. Step 2: Convert to fraction form
    21,052.80/29,052 = 13,488.48/x
  3. Step 3: Cross multiply
    21,052.80x = 29,052 × 13,488.48
  4. Step 4: Simplify right side
    21,052.80x = 391,867,320.96
  5. Step 5: Solve for x
    x = 391,867,320.96/21,052.80
  6. Step 6: Final answer
    x = 18,613.55

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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.