Home / 20,711.78-28,582.97-11,758.98

Finding the Fourth Proportional to 20,711.78, 28,582.97 and 11,758.98

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Solution

The fourth proportional to 20,711.78, 28,582.97 and 11,758.98 is: 16,227.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.78 : 28,582.97 = 11,758.98 : x
  2. Step 2: Convert to fraction form
    20,711.78/28,582.97 = 11,758.98/x
  3. Step 3: Cross multiply
    20,711.78x = 28,582.97 × 11,758.98
  4. Step 4: Simplify right side
    20,711.78x = 336,106,513.78
  5. Step 5: Solve for x
    x = 336,106,513.78/20,711.78
  6. Step 6: Final answer
    x = 16,227.80

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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.