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Finding the Fourth Proportional to 28,273.70, 42,410.55 and 18,432.20

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Solution

The fourth proportional to 28,273.70, 42,410.55 and 18,432.20 is: 27,648.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,273.70 : 42,410.55 = 18,432.20 : x
  2. Step 2: Convert to fraction form
    28,273.70/42,410.55 = 18,432.20/x
  3. Step 3: Cross multiply
    28,273.70x = 42,410.55 × 18,432.20
  4. Step 4: Simplify right side
    28,273.70x = 781,719,739.71
  5. Step 5: Solve for x
    x = 781,719,739.71/28,273.70
  6. Step 6: Final answer
    x = 27,648.30

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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.