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Finding the Fourth Proportional to 28,805.96, 39,770.28 and 22,078.88

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Solution

The fourth proportional to 28,805.96, 39,770.28 and 22,078.88 is: 30,482.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,805.96 : 39,770.28 = 22,078.88 : x
  2. Step 2: Convert to fraction form
    28,805.96/39,770.28 = 22,078.88/x
  3. Step 3: Cross multiply
    28,805.96x = 39,770.28 × 22,078.88
  4. Step 4: Simplify right side
    28,805.96x = 878,083,239.69
  5. Step 5: Solve for x
    x = 878,083,239.69/28,805.96
  6. Step 6: Final answer
    x = 30,482.69

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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.