Home / 21,321.12-31,982.64-6,528.96

Finding the Fourth Proportional to 21,321.12, 31,982.64 and 6,528.96

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Solution

The fourth proportional to 21,321.12, 31,982.64 and 6,528.96 is: 9,793.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.12 : 31,982.64 = 6,528.96 : x
  2. Step 2: Convert to fraction form
    21,321.12/31,982.64 = 6,528.96/x
  3. Step 3: Cross multiply
    21,321.12x = 31,982.64 × 6,528.96
  4. Step 4: Simplify right side
    21,321.12x = 208,813,377.25
  5. Step 5: Solve for x
    x = 208,813,377.25/21,321.12
  6. Step 6: Final answer
    x = 9,793.73

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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.