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Finding the Fourth Proportional to 28,181.75, 42,279.11 and 9,713.75

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Solution

The fourth proportional to 28,181.75, 42,279.11 and 9,713.75 is: 14,572.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,181.75 : 42,279.11 = 9,713.75 : x
  2. Step 2: Convert to fraction form
    28,181.75/42,279.11 = 9,713.75/x
  3. Step 3: Cross multiply
    28,181.75x = 42,279.11 × 9,713.75
  4. Step 4: Simplify right side
    28,181.75x = 410,688,656.19
  5. Step 5: Solve for x
    x = 410,688,656.19/28,181.75
  6. Step 6: Final answer
    x = 14,572.86

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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.