Home / 21,688.92-32,471.40-20,311.12

Finding the Fourth Proportional to 21,688.92, 32,471.40 and 20,311.12

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Solution

The fourth proportional to 21,688.92, 32,471.40 and 20,311.12 is: 30,408.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,688.92 : 32,471.40 = 20,311.12 : x
  2. Step 2: Convert to fraction form
    21,688.92/32,471.40 = 20,311.12/x
  3. Step 3: Cross multiply
    21,688.92x = 32,471.40 × 20,311.12
  4. Step 4: Simplify right side
    21,688.92x = 659,530,501.97
  5. Step 5: Solve for x
    x = 659,530,501.97/21,688.92
  6. Step 6: Final answer
    x = 30,408.64

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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.