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Finding the Fourth Proportional to 20,936.40, 31,401.30 and 17,401.22

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Solution

The fourth proportional to 20,936.40, 31,401.30 and 17,401.22 is: 26,099.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.40 : 31,401.30 = 17,401.22 : x
  2. Step 2: Convert to fraction form
    20,936.40/31,401.30 = 17,401.22/x
  3. Step 3: Cross multiply
    20,936.40x = 31,401.30 × 17,401.22
  4. Step 4: Simplify right side
    20,936.40x = 546,420,772.58
  5. Step 5: Solve for x
    x = 546,420,772.58/20,936.40
  6. Step 6: Final answer
    x = 26,099.08

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1.5x scale

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.