Home / 21,318.02-31,979.94-7,274.28

Finding the Fourth Proportional to 21,318.02, 31,979.94 and 7,274.28

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Solution

The fourth proportional to 21,318.02, 31,979.94 and 7,274.28 is: 10,912.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.02 : 31,979.94 = 7,274.28 : x
  2. Step 2: Convert to fraction form
    21,318.02/31,979.94 = 7,274.28/x
  3. Step 3: Cross multiply
    21,318.02x = 31,979.94 × 7,274.28
  4. Step 4: Simplify right side
    21,318.02x = 232,631,037.94
  5. Step 5: Solve for x
    x = 232,631,037.94/21,318.02
  6. Step 6: Final answer
    x = 10,912.41

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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.