Home / 21,021.20-31,531.72-6,982.30

Finding the Fourth Proportional to 21,021.20, 31,531.72 and 6,982.30

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Solution

The fourth proportional to 21,021.20, 31,531.72 and 6,982.30 is: 10,473.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.20 : 31,531.72 = 6,982.30 : x
  2. Step 2: Convert to fraction form
    21,021.20/31,531.72 = 6,982.30/x
  3. Step 3: Cross multiply
    21,021.20x = 31,531.72 × 6,982.30
  4. Step 4: Simplify right side
    21,021.20x = 220,163,928.56
  5. Step 5: Solve for x
    x = 220,163,928.56/21,021.20
  6. Step 6: Final answer
    x = 10,473.42

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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.