Home / 20,766.90-28,658.13-12,805.94

Finding the Fourth Proportional to 20,766.90, 28,658.13 and 12,805.94

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Solution

The fourth proportional to 20,766.90, 28,658.13 and 12,805.94 is: 17,672.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.90 : 28,658.13 = 12,805.94 : x
  2. Step 2: Convert to fraction form
    20,766.90/28,658.13 = 12,805.94/x
  3. Step 3: Cross multiply
    20,766.90x = 28,658.13 × 12,805.94
  4. Step 4: Simplify right side
    20,766.90x = 366,994,293.29
  5. Step 5: Solve for x
    x = 366,994,293.29/20,766.90
  6. Step 6: Final answer
    x = 17,672.08

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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.