Home / 28,187.20-42,252.99-12,400.75

Finding the Fourth Proportional to 28,187.20, 42,252.99 and 12,400.75

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Solution

The fourth proportional to 28,187.20, 42,252.99 and 12,400.75 is: 18,588.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,187.20 : 42,252.99 = 12,400.75 : x
  2. Step 2: Convert to fraction form
    28,187.20/42,252.99 = 12,400.75/x
  3. Step 3: Cross multiply
    28,187.20x = 42,252.99 × 12,400.75
  4. Step 4: Simplify right side
    28,187.20x = 523,968,765.74
  5. Step 5: Solve for x
    x = 523,968,765.74/28,187.20
  6. Step 6: Final answer
    x = 18,588.89

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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.