Home / 20,940.22-28,887.87-12,866.55

Finding the Fourth Proportional to 20,940.22, 28,887.87 and 12,866.55

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Solution

The fourth proportional to 20,940.22, 28,887.87 and 12,866.55 is: 17,749.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.22 : 28,887.87 = 12,866.55 : x
  2. Step 2: Convert to fraction form
    20,940.22/28,887.87 = 12,866.55/x
  3. Step 3: Cross multiply
    20,940.22x = 28,887.87 × 12,866.55
  4. Step 4: Simplify right side
    20,940.22x = 371,687,223.75
  5. Step 5: Solve for x
    x = 371,687,223.75/20,940.22
  6. Step 6: Final answer
    x = 17,749.92

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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.