Home / 20,903.70-31,355.66-5,321.32

Finding the Fourth Proportional to 20,903.70, 31,355.66 and 5,321.32

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Solution

The fourth proportional to 20,903.70, 31,355.66 and 5,321.32 is: 7,982.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,903.70 : 31,355.66 = 5,321.32 : x
  2. Step 2: Convert to fraction form
    20,903.70/31,355.66 = 5,321.32/x
  3. Step 3: Cross multiply
    20,903.70x = 31,355.66 × 5,321.32
  4. Step 4: Simplify right side
    20,903.70x = 166,853,493.84
  5. Step 5: Solve for x
    x = 166,853,493.84/20,903.70
  6. Step 6: Final answer
    x = 7,982.01

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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.