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Finding the Fourth Proportional to 28,555.20, 39,431.20 and 17,963.20

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Solution

The fourth proportional to 28,555.20, 39,431.20 and 17,963.20 is: 24,804.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,555.20 : 39,431.20 = 17,963.20 : x
  2. Step 2: Convert to fraction form
    28,555.20/39,431.20 = 17,963.20/x
  3. Step 3: Cross multiply
    28,555.20x = 39,431.20 × 17,963.20
  4. Step 4: Simplify right side
    28,555.20x = 708,310,531.84
  5. Step 5: Solve for x
    x = 708,310,531.84/28,555.20
  6. Step 6: Final answer
    x = 24,804.96

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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.