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Finding the Fourth Proportional to 28,188.74, 38,904.60 and 16,249.74

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Solution

The fourth proportional to 28,188.74, 38,904.60 and 16,249.74 is: 22,427.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,188.74 : 38,904.60 = 16,249.74 : x
  2. Step 2: Convert to fraction form
    28,188.74/38,904.60 = 16,249.74/x
  3. Step 3: Cross multiply
    28,188.74x = 38,904.60 × 16,249.74
  4. Step 4: Simplify right side
    28,188.74x = 632,189,634.80
  5. Step 5: Solve for x
    x = 632,189,634.80/28,188.74
  6. Step 6: Final answer
    x = 22,427.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.