Home / 20,453.60-30,672.24-7,971.92

Finding the Fourth Proportional to 20,453.60, 30,672.24 and 7,971.92

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Solution

The fourth proportional to 20,453.60, 30,672.24 and 7,971.92 is: 11,954.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,453.60 : 30,672.24 = 7,971.92 : x
  2. Step 2: Convert to fraction form
    20,453.60/30,672.24 = 7,971.92/x
  3. Step 3: Cross multiply
    20,453.60x = 30,672.24 × 7,971.92
  4. Step 4: Simplify right side
    20,453.60x = 244,516,643.50
  5. Step 5: Solve for x
    x = 244,516,643.50/20,453.60
  6. Step 6: Final answer
    x = 11,954.70

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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.