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Finding the Fourth Proportional to 12,641.65, 18,947.10 and 8,944.95

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Solution

The fourth proportional to 12,641.65, 18,947.10 and 8,944.95 is: 13,406.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,641.65 : 18,947.10 = 8,944.95 : x
  2. Step 2: Convert to fraction form
    12,641.65/18,947.10 = 8,944.95/x
  3. Step 3: Cross multiply
    12,641.65x = 18,947.10 × 8,944.95
  4. Step 4: Simplify right side
    12,641.65x = 169,480,767.41
  5. Step 5: Solve for x
    x = 169,480,767.41/12,641.65
  6. Step 6: Final answer
    x = 13,406.54

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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.