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Finding the Fourth Proportional to 12,454.57, 18,661.08 and 8,939.30

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Solution

The fourth proportional to 12,454.57, 18,661.08 and 8,939.30 is: 13,394.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,454.57 : 18,661.08 = 8,939.30 : x
  2. Step 2: Convert to fraction form
    12,454.57/18,661.08 = 8,939.30/x
  3. Step 3: Cross multiply
    12,454.57x = 18,661.08 × 8,939.30
  4. Step 4: Simplify right side
    12,454.57x = 166,817,039.10
  5. Step 5: Solve for x
    x = 166,817,039.10/12,454.57
  6. Step 6: Final answer
    x = 13,394.05

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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.