Home / 21,188.10-31,787.29-6,396.13

Finding the Fourth Proportional to 21,188.10, 31,787.29 and 6,396.13

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Solution

The fourth proportional to 21,188.10, 31,787.29 and 6,396.13 is: 9,595.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,188.10 : 31,787.29 = 6,396.13 : x
  2. Step 2: Convert to fraction form
    21,188.10/31,787.29 = 6,396.13/x
  3. Step 3: Cross multiply
    21,188.10x = 31,787.29 × 6,396.13
  4. Step 4: Simplify right side
    21,188.10x = 203,315,650.94
  5. Step 5: Solve for x
    x = 203,315,650.94/21,188.10
  6. Step 6: Final answer
    x = 9,595.75

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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.