Home / 21,972.78-32,981.04-12,116.70

Finding the Fourth Proportional to 21,972.78, 32,981.04 and 12,116.70

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Solution

The fourth proportional to 21,972.78, 32,981.04 and 12,116.70 is: 18,187.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.78 : 32,981.04 = 12,116.70 : x
  2. Step 2: Convert to fraction form
    21,972.78/32,981.04 = 12,116.70/x
  3. Step 3: Cross multiply
    21,972.78x = 32,981.04 × 12,116.70
  4. Step 4: Simplify right side
    21,972.78x = 399,621,367.37
  5. Step 5: Solve for x
    x = 399,621,367.37/21,972.78
  6. Step 6: Final answer
    x = 18,187.11

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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.