Home / 21,115.17-31,688.31-10,021.89

Finding the Fourth Proportional to 21,115.17, 31,688.31 and 10,021.89

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Solution

The fourth proportional to 21,115.17, 31,688.31 and 10,021.89 is: 15,040.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.17 : 31,688.31 = 10,021.89 : x
  2. Step 2: Convert to fraction form
    21,115.17/31,688.31 = 10,021.89/x
  3. Step 3: Cross multiply
    21,115.17x = 31,688.31 × 10,021.89
  4. Step 4: Simplify right side
    21,115.17x = 317,576,757.11
  5. Step 5: Solve for x
    x = 317,576,757.11/21,115.17
  6. Step 6: Final answer
    x = 15,040.22

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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.