Home / 21,631.20-32,427.60-12,856.80

Finding the Fourth Proportional to 21,631.20, 32,427.60 and 12,856.80

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Solution

The fourth proportional to 21,631.20, 32,427.60 and 12,856.80 is: 19,273.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,631.20 : 32,427.60 = 12,856.80 : x
  2. Step 2: Convert to fraction form
    21,631.20/32,427.60 = 12,856.80/x
  3. Step 3: Cross multiply
    21,631.20x = 32,427.60 × 12,856.80
  4. Step 4: Simplify right side
    21,631.20x = 416,915,167.68
  5. Step 5: Solve for x
    x = 416,915,167.68/21,631.20
  6. Step 6: Final answer
    x = 19,273.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.