Home / 20,665.48-30,990.24-8,811.76

Finding the Fourth Proportional to 20,665.48, 30,990.24 and 8,811.76

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Solution

The fourth proportional to 20,665.48, 30,990.24 and 8,811.76 is: 13,214.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.48 : 30,990.24 = 8,811.76 : x
  2. Step 2: Convert to fraction form
    20,665.48/30,990.24 = 8,811.76/x
  3. Step 3: Cross multiply
    20,665.48x = 30,990.24 × 8,811.76
  4. Step 4: Simplify right side
    20,665.48x = 273,078,557.22
  5. Step 5: Solve for x
    x = 273,078,557.22/20,665.48
  6. Step 6: Final answer
    x = 13,214.24

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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.