Home / 21,981.12-32,977.26-6,398.74

Finding the Fourth Proportional to 21,981.12, 32,977.26 and 6,398.74

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Solution

The fourth proportional to 21,981.12, 32,977.26 and 6,398.74 is: 9,599.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.12 : 32,977.26 = 6,398.74 : x
  2. Step 2: Convert to fraction form
    21,981.12/32,977.26 = 6,398.74/x
  3. Step 3: Cross multiply
    21,981.12x = 32,977.26 × 6,398.74
  4. Step 4: Simplify right side
    21,981.12x = 211,012,912.65
  5. Step 5: Solve for x
    x = 211,012,912.65/21,981.12
  6. Step 6: Final answer
    x = 9,599.73

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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.