Home / 20,936.34-31,409.10-6,895.80

Finding the Fourth Proportional to 20,936.34, 31,409.10 and 6,895.80

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Solution

The fourth proportional to 20,936.34, 31,409.10 and 6,895.80 is: 10,345.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.34 : 31,409.10 = 6,895.80 : x
  2. Step 2: Convert to fraction form
    20,936.34/31,409.10 = 6,895.80/x
  3. Step 3: Cross multiply
    20,936.34x = 31,409.10 × 6,895.80
  4. Step 4: Simplify right side
    20,936.34x = 216,590,871.78
  5. Step 5: Solve for x
    x = 216,590,871.78/20,936.34
  6. Step 6: Final answer
    x = 10,345.21

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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.