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Finding the Fourth Proportional to 28,808.25, 39,755.39 and 15,560.25

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Solution

The fourth proportional to 28,808.25, 39,755.39 and 15,560.25 is: 21,473.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,808.25 : 39,755.39 = 15,560.25 : x
  2. Step 2: Convert to fraction form
    28,808.25/39,755.39 = 15,560.25/x
  3. Step 3: Cross multiply
    28,808.25x = 39,755.39 × 15,560.25
  4. Step 4: Simplify right side
    28,808.25x = 618,603,807.25
  5. Step 5: Solve for x
    x = 618,603,807.25/28,808.25
  6. Step 6: Final answer
    x = 21,473.15

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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.