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Finding the Fourth Proportional to 12,207.95, 18,295.96 and 6,659.80

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Solution

The fourth proportional to 12,207.95, 18,295.96 and 6,659.80 is: 9,980.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,207.95 : 18,295.96 = 6,659.80 : x
  2. Step 2: Convert to fraction form
    12,207.95/18,295.96 = 6,659.80/x
  3. Step 3: Cross multiply
    12,207.95x = 18,295.96 × 6,659.80
  4. Step 4: Simplify right side
    12,207.95x = 121,847,434.41
  5. Step 5: Solve for x
    x = 121,847,434.41/12,207.95
  6. Step 6: Final answer
    x = 9,980.99

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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.