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Finding the Fourth Proportional to 28,091.60, 42,121.20 and 10,563.20

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Solution

The fourth proportional to 28,091.60, 42,121.20 and 10,563.20 is: 15,838.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,091.60 : 42,121.20 = 10,563.20 : x
  2. Step 2: Convert to fraction form
    28,091.60/42,121.20 = 10,563.20/x
  3. Step 3: Cross multiply
    28,091.60x = 42,121.20 × 10,563.20
  4. Step 4: Simplify right side
    28,091.60x = 444,934,659.84
  5. Step 5: Solve for x
    x = 444,934,659.84/28,091.60
  6. Step 6: Final answer
    x = 15,838.71

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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.