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Finding the Fourth Proportional to 20,766.66, 28,657.08 and 11,813.10

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Solution

The fourth proportional to 20,766.66, 28,657.08 and 11,813.10 is: 16,301.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.66 : 28,657.08 = 11,813.10 : x
  2. Step 2: Convert to fraction form
    20,766.66/28,657.08 = 11,813.10/x
  3. Step 3: Cross multiply
    20,766.66x = 28,657.08 × 11,813.10
  4. Step 4: Simplify right side
    20,766.66x = 338,528,951.75
  5. Step 5: Solve for x
    x = 338,528,951.75/20,766.66
  6. Step 6: Final answer
    x = 16,301.56

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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.