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Finding the Fourth Proportional to 30,389.70, 41,932.44 and 16,959.90

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Solution

The fourth proportional to 30,389.70, 41,932.44 and 16,959.90 is: 23,401.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,389.70 : 41,932.44 = 16,959.90 : x
  2. Step 2: Convert to fraction form
    30,389.70/41,932.44 = 16,959.90/x
  3. Step 3: Cross multiply
    30,389.70x = 41,932.44 × 16,959.90
  4. Step 4: Simplify right side
    30,389.70x = 711,169,989.16
  5. Step 5: Solve for x
    x = 711,169,989.16/30,389.70
  6. Step 6: Final answer
    x = 23,401.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.