Home / 21,112.84-31,639.02-10,731.88

Finding the Fourth Proportional to 21,112.84, 31,639.02 and 10,731.88

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Solution

The fourth proportional to 21,112.84, 31,639.02 and 10,731.88 is: 16,082.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.84 : 31,639.02 = 10,731.88 : x
  2. Step 2: Convert to fraction form
    21,112.84/31,639.02 = 10,731.88/x
  3. Step 3: Cross multiply
    21,112.84x = 31,639.02 × 10,731.88
  4. Step 4: Simplify right side
    21,112.84x = 339,546,165.96
  5. Step 5: Solve for x
    x = 339,546,165.96/21,112.84
  6. Step 6: Final answer
    x = 16,082.45

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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.