Home / 21,381.39-32,078.03-8,907.30

Finding the Fourth Proportional to 21,381.39, 32,078.03 and 8,907.30

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Solution

The fourth proportional to 21,381.39, 32,078.03 and 8,907.30 is: 13,363.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,381.39 : 32,078.03 = 8,907.30 : x
  2. Step 2: Convert to fraction form
    21,381.39/32,078.03 = 8,907.30/x
  3. Step 3: Cross multiply
    21,381.39x = 32,078.03 × 8,907.30
  4. Step 4: Simplify right side
    21,381.39x = 285,728,592.08
  5. Step 5: Solve for x
    x = 285,728,592.08/21,381.39
  6. Step 6: Final answer
    x = 13,363.42

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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.