Home / 20,766.95-28,657.39-11,813.61

Finding the Fourth Proportional to 20,766.95, 28,657.39 and 11,813.61

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Solution

The fourth proportional to 20,766.95, 28,657.39 and 11,813.61 is: 16,302.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.95 : 28,657.39 = 11,813.61 : x
  2. Step 2: Convert to fraction form
    20,766.95/28,657.39 = 11,813.61/x
  3. Step 3: Cross multiply
    20,766.95x = 28,657.39 × 11,813.61
  4. Step 4: Simplify right side
    20,766.95x = 338,547,229.08
  5. Step 5: Solve for x
    x = 338,547,229.08/20,766.95
  6. Step 6: Final answer
    x = 16,302.21

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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.