Home / 21,180.21-31,770.54-6,389.25

Finding the Fourth Proportional to 21,180.21, 31,770.54 and 6,389.25

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Solution

The fourth proportional to 21,180.21, 31,770.54 and 6,389.25 is: 9,583.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.21 : 31,770.54 = 6,389.25 : x
  2. Step 2: Convert to fraction form
    21,180.21/31,770.54 = 6,389.25/x
  3. Step 3: Cross multiply
    21,180.21x = 31,770.54 × 6,389.25
  4. Step 4: Simplify right side
    21,180.21x = 202,990,000.11
  5. Step 5: Solve for x
    x = 202,990,000.11/21,180.21
  6. Step 6: Final answer
    x = 9,583.95

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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.