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Finding the Fourth Proportional to 9,179.95, 12,664.20 and 5,641.87

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Solution

The fourth proportional to 9,179.95, 12,664.20 and 5,641.87 is: 7,783.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,179.95 : 12,664.20 = 5,641.87 : x
  2. Step 2: Convert to fraction form
    9,179.95/12,664.20 = 5,641.87/x
  3. Step 3: Cross multiply
    9,179.95x = 12,664.20 × 5,641.87
  4. Step 4: Simplify right side
    9,179.95x = 71,449,770.05
  5. Step 5: Solve for x
    x = 71,449,770.05/9,179.95
  6. Step 6: Final answer
    x = 7,783.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.