Home / 21,269.49-31,905.70-7,223.78

Finding the Fourth Proportional to 21,269.49, 31,905.70 and 7,223.78

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Solution

The fourth proportional to 21,269.49, 31,905.70 and 7,223.78 is: 10,836.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269.49 : 31,905.70 = 7,223.78 : x
  2. Step 2: Convert to fraction form
    21,269.49/31,905.70 = 7,223.78/x
  3. Step 3: Cross multiply
    21,269.49x = 31,905.70 × 7,223.78
  4. Step 4: Simplify right side
    21,269.49x = 230,479,757.55
  5. Step 5: Solve for x
    x = 230,479,757.55/21,269.49
  6. Step 6: Final answer
    x = 10,836.17

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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.