Home / 28,104.80-42,159.60-8,382.08

Finding the Fourth Proportional to 28,104.80, 42,159.60 and 8,382.08

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Solution

The fourth proportional to 28,104.80, 42,159.60 and 8,382.08 is: 12,573.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,104.80 : 42,159.60 = 8,382.08 : x
  2. Step 2: Convert to fraction form
    28,104.80/42,159.60 = 8,382.08/x
  3. Step 3: Cross multiply
    28,104.80x = 42,159.60 × 8,382.08
  4. Step 4: Simplify right side
    28,104.80x = 353,385,139.97
  5. Step 5: Solve for x
    x = 353,385,139.97/28,104.80
  6. Step 6: Final answer
    x = 12,573.84

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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.