Home / 21,007.50-28,989.04-11,576.07

Finding the Fourth Proportional to 21,007.50, 28,989.04 and 11,576.07

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Solution

The fourth proportional to 21,007.50, 28,989.04 and 11,576.07 is: 15,974.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.50 : 28,989.04 = 11,576.07 : x
  2. Step 2: Convert to fraction form
    21,007.50/28,989.04 = 11,576.07/x
  3. Step 3: Cross multiply
    21,007.50x = 28,989.04 × 11,576.07
  4. Step 4: Simplify right side
    21,007.50x = 335,579,156.27
  5. Step 5: Solve for x
    x = 335,579,156.27/21,007.50
  6. Step 6: Final answer
    x = 15,974.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.