Home / 28,481.28-42,743.52-12,909.60

Finding the Fourth Proportional to 28,481.28, 42,743.52 and 12,909.60

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Solution

The fourth proportional to 28,481.28, 42,743.52 and 12,909.60 is: 19,374.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,481.28 : 42,743.52 = 12,909.60 : x
  2. Step 2: Convert to fraction form
    28,481.28/42,743.52 = 12,909.60/x
  3. Step 3: Cross multiply
    28,481.28x = 42,743.52 × 12,909.60
  4. Step 4: Simplify right side
    28,481.28x = 551,801,745.79
  5. Step 5: Solve for x
    x = 551,801,745.79/28,481.28
  6. Step 6: Final answer
    x = 19,374.19

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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.