Home / 20,840.27-28,759.76-12,342.87

Finding the Fourth Proportional to 20,840.27, 28,759.76 and 12,342.87

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Solution

The fourth proportional to 20,840.27, 28,759.76 and 12,342.87 is: 17,033.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.27 : 28,759.76 = 12,342.87 : x
  2. Step 2: Convert to fraction form
    20,840.27/28,759.76 = 12,342.87/x
  3. Step 3: Cross multiply
    20,840.27x = 28,759.76 × 12,342.87
  4. Step 4: Simplify right side
    20,840.27x = 354,977,917.20
  5. Step 5: Solve for x
    x = 354,977,917.20/20,840.27
  6. Step 6: Final answer
    x = 17,033.27

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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.