Home / 20,816.40-31,217.54-6,772.96

Finding the Fourth Proportional to 20,816.40, 31,217.54 and 6,772.96

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Solution

The fourth proportional to 20,816.40, 31,217.54 and 6,772.96 is: 10,157.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.40 : 31,217.54 = 6,772.96 : x
  2. Step 2: Convert to fraction form
    20,816.40/31,217.54 = 6,772.96/x
  3. Step 3: Cross multiply
    20,816.40x = 31,217.54 × 6,772.96
  4. Step 4: Simplify right side
    20,816.40x = 211,434,993.63
  5. Step 5: Solve for x
    x = 211,434,993.63/20,816.40
  6. Step 6: Final answer
    x = 10,157.14

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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.