Home / 20,981.16-31,463.78-6,936.98

Finding the Fourth Proportional to 20,981.16, 31,463.78 and 6,936.98

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Solution

The fourth proportional to 20,981.16, 31,463.78 and 6,936.98 is: 10,402.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.16 : 31,463.78 = 6,936.98 : x
  2. Step 2: Convert to fraction form
    20,981.16/31,463.78 = 6,936.98/x
  3. Step 3: Cross multiply
    20,981.16x = 31,463.78 × 6,936.98
  4. Step 4: Simplify right side
    20,981.16x = 218,263,420.58
  5. Step 5: Solve for x
    x = 218,263,420.58/20,981.16
  6. Step 6: Final answer
    x = 10,402.83

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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.