Home / 20,854.75-28,782.33-11,900.20

Finding the Fourth Proportional to 20,854.75, 28,782.33 and 11,900.20

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Solution

The fourth proportional to 20,854.75, 28,782.33 and 11,900.20 is: 16,423.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.75 : 28,782.33 = 11,900.20 : x
  2. Step 2: Convert to fraction form
    20,854.75/28,782.33 = 11,900.20/x
  3. Step 3: Cross multiply
    20,854.75x = 28,782.33 × 11,900.20
  4. Step 4: Simplify right side
    20,854.75x = 342,515,483.47
  5. Step 5: Solve for x
    x = 342,515,483.47/20,854.75
  6. Step 6: Final answer
    x = 16,423.86

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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.