Home / 20,766.72-28,657.92-12,382.08

Finding the Fourth Proportional to 20,766.72, 28,657.92 and 12,382.08

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Solution

The fourth proportional to 20,766.72, 28,657.92 and 12,382.08 is: 17,087.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.72 : 28,657.92 = 12,382.08 : x
  2. Step 2: Convert to fraction form
    20,766.72/28,657.92 = 12,382.08/x
  3. Step 3: Cross multiply
    20,766.72x = 28,657.92 × 12,382.08
  4. Step 4: Simplify right side
    20,766.72x = 354,844,658.07
  5. Step 5: Solve for x
    x = 354,844,658.07/20,766.72
  6. Step 6: Final answer
    x = 17,087.18

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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.