Home / 18,961.12-28,449-7,864.96

Finding the Fourth Proportional to 18,961.12, 28,449 and 7,864.96

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Solution

The fourth proportional to 18,961.12, 28,449 and 7,864.96 is: 11,800.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,961.12 : 28,449 = 7,864.96 : x
  2. Step 2: Convert to fraction form
    18,961.12/28,449 = 7,864.96/x
  3. Step 3: Cross multiply
    18,961.12x = 28,449 × 7,864.96
  4. Step 4: Simplify right side
    18,961.12x = 223,750,247.04
  5. Step 5: Solve for x
    x = 223,750,247.04/18,961.12
  6. Step 6: Final answer
    x = 11,800.48

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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.