Home / 20,782.98-28,691.22-12,287.70

Finding the Fourth Proportional to 20,782.98, 28,691.22 and 12,287.70

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Solution

The fourth proportional to 20,782.98, 28,691.22 and 12,287.70 is: 16,963.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.98 : 28,691.22 = 12,287.70 : x
  2. Step 2: Convert to fraction form
    20,782.98/28,691.22 = 12,287.70/x
  3. Step 3: Cross multiply
    20,782.98x = 28,691.22 × 12,287.70
  4. Step 4: Simplify right side
    20,782.98x = 352,549,103.99
  5. Step 5: Solve for x
    x = 352,549,103.99/20,782.98
  6. Step 6: Final answer
    x = 16,963.36

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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.