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Finding the Fourth Proportional to 28,372.88, 39,153.88 and 15,797.36

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Solution

The fourth proportional to 28,372.88, 39,153.88 and 15,797.36 is: 21,799.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,372.88 : 39,153.88 = 15,797.36 : x
  2. Step 2: Convert to fraction form
    28,372.88/39,153.88 = 15,797.36/x
  3. Step 3: Cross multiply
    28,372.88x = 39,153.88 × 15,797.36
  4. Step 4: Simplify right side
    28,372.88x = 618,527,937.76
  5. Step 5: Solve for x
    x = 618,527,937.76/28,372.88
  6. Step 6: Final answer
    x = 21,799.97

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1.5x scale

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.