Home / 21,336.84-31,943.28-12,425

Finding the Fourth Proportional to 21,336.84, 31,943.28 and 12,425

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Solution

The fourth proportional to 21,336.84, 31,943.28 and 12,425 is: 18,601.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,336.84 : 31,943.28 = 12,425 : x
  2. Step 2: Convert to fraction form
    21,336.84/31,943.28 = 12,425/x
  3. Step 3: Cross multiply
    21,336.84x = 31,943.28 × 12,425
  4. Step 4: Simplify right side
    21,336.84x = 396,895,254
  5. Step 5: Solve for x
    x = 396,895,254/21,336.84
  6. Step 6: Final answer
    x = 18,601.41

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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.