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Finding the Fourth Proportional to 18,856.80, 28,264.55 and 9,481.86

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Solution

The fourth proportional to 18,856.80, 28,264.55 and 9,481.86 is: 14,212.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,856.80 : 28,264.55 = 9,481.86 : x
  2. Step 2: Convert to fraction form
    18,856.80/28,264.55 = 9,481.86/x
  3. Step 3: Cross multiply
    18,856.80x = 28,264.55 × 9,481.86
  4. Step 4: Simplify right side
    18,856.80x = 268,000,458.65
  5. Step 5: Solve for x
    x = 268,000,458.65/18,856.80
  6. Step 6: Final answer
    x = 14,212.40

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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.