Home / 20,333.60-30,479.68-8,639.36

Finding the Fourth Proportional to 20,333.60, 30,479.68 and 8,639.36

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Solution

The fourth proportional to 20,333.60, 30,479.68 and 8,639.36 is: 12,950.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,333.60 : 30,479.68 = 8,639.36 : x
  2. Step 2: Convert to fraction form
    20,333.60/30,479.68 = 8,639.36/x
  3. Step 3: Cross multiply
    20,333.60x = 30,479.68 × 8,639.36
  4. Step 4: Simplify right side
    20,333.60x = 263,324,928.20
  5. Step 5: Solve for x
    x = 263,324,928.20/20,333.60
  6. Step 6: Final answer
    x = 12,950.24

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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.