Home / 21,266.75-31,889.40-12,384.95

Finding the Fourth Proportional to 21,266.75, 31,889.40 and 12,384.95

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Solution

The fourth proportional to 21,266.75, 31,889.40 and 12,384.95 is: 18,571.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,266.75 : 31,889.40 = 12,384.95 : x
  2. Step 2: Convert to fraction form
    21,266.75/31,889.40 = 12,384.95/x
  3. Step 3: Cross multiply
    21,266.75x = 31,889.40 × 12,384.95
  4. Step 4: Simplify right side
    21,266.75x = 394,948,624.53
  5. Step 5: Solve for x
    x = 394,948,624.53/21,266.75
  6. Step 6: Final answer
    x = 18,571.18

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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.