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Finding the Fourth Proportional to 18,887.25, 28,331.48 and 5,739.74

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Solution

The fourth proportional to 18,887.25, 28,331.48 and 5,739.74 is: 8,609.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,887.25 : 28,331.48 = 5,739.74 : x
  2. Step 2: Convert to fraction form
    18,887.25/28,331.48 = 5,739.74/x
  3. Step 3: Cross multiply
    18,887.25x = 28,331.48 × 5,739.74
  4. Step 4: Simplify right side
    18,887.25x = 162,615,158.66
  5. Step 5: Solve for x
    x = 162,615,158.66/18,887.25
  6. Step 6: Final answer
    x = 8,609.78

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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.