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Finding the Fourth Proportional to 28,033.60, 42,034.20 and 10,505.20

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Solution

The fourth proportional to 28,033.60, 42,034.20 and 10,505.20 is: 15,751.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,033.60 : 42,034.20 = 10,505.20 : x
  2. Step 2: Convert to fraction form
    28,033.60/42,034.20 = 10,505.20/x
  3. Step 3: Cross multiply
    28,033.60x = 42,034.20 × 10,505.20
  4. Step 4: Simplify right side
    28,033.60x = 441,577,677.84
  5. Step 5: Solve for x
    x = 441,577,677.84/28,033.60
  6. Step 6: Final answer
    x = 15,751.73

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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.