Home / 28,155.60-42,241.86-8,434.80

Finding the Fourth Proportional to 28,155.60, 42,241.86 and 8,434.80

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Solution

The fourth proportional to 28,155.60, 42,241.86 and 8,434.80 is: 12,654.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,155.60 : 42,241.86 = 8,434.80 : x
  2. Step 2: Convert to fraction form
    28,155.60/42,241.86 = 8,434.80/x
  3. Step 3: Cross multiply
    28,155.60x = 42,241.86 × 8,434.80
  4. Step 4: Simplify right side
    28,155.60x = 356,301,640.73
  5. Step 5: Solve for x
    x = 356,301,640.73/28,155.60
  6. Step 6: Final answer
    x = 12,654.73

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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.