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Finding the Fourth Proportional to 25,627.80, 38,368.80 and 19,747.20

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Solution

The fourth proportional to 25,627.80, 38,368.80 and 19,747.20 is: 29,564.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,627.80 : 38,368.80 = 19,747.20 : x
  2. Step 2: Convert to fraction form
    25,627.80/38,368.80 = 19,747.20/x
  3. Step 3: Cross multiply
    25,627.80x = 38,368.80 × 19,747.20
  4. Step 4: Simplify right side
    25,627.80x = 757,676,367.36
  5. Step 5: Solve for x
    x = 757,676,367.36/25,627.80
  6. Step 6: Final answer
    x = 29,564.63

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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.