Home / 20,817.92-28,728.72-11,865.44

Finding the Fourth Proportional to 20,817.92, 28,728.72 and 11,865.44

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Solution

The fourth proportional to 20,817.92, 28,728.72 and 11,865.44 is: 16,374.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.92 : 28,728.72 = 11,865.44 : x
  2. Step 2: Convert to fraction form
    20,817.92/28,728.72 = 11,865.44/x
  3. Step 3: Cross multiply
    20,817.92x = 28,728.72 × 11,865.44
  4. Step 4: Simplify right side
    20,817.92x = 340,878,903.44
  5. Step 5: Solve for x
    x = 340,878,903.44/20,817.92
  6. Step 6: Final answer
    x = 16,374.30

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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.