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Finding the Fourth Proportional to 28,546.80, 42,820.20 and 25,630.80

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Solution

The fourth proportional to 28,546.80, 42,820.20 and 25,630.80 is: 38,446.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,546.80 : 42,820.20 = 25,630.80 : x
  2. Step 2: Convert to fraction form
    28,546.80/42,820.20 = 25,630.80/x
  3. Step 3: Cross multiply
    28,546.80x = 42,820.20 × 25,630.80
  4. Step 4: Simplify right side
    28,546.80x = 1,097,515,982.16
  5. Step 5: Solve for x
    x = 1,097,515,982.16/28,546.80
  6. Step 6: Final answer
    x = 38,446.20

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1.5x scale

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.