Home / 21,007.70-28,989.87-11,576.30

Finding the Fourth Proportional to 21,007.70, 28,989.87 and 11,576.30

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Solution

The fourth proportional to 21,007.70, 28,989.87 and 11,576.30 is: 15,974.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.70 : 28,989.87 = 11,576.30 : x
  2. Step 2: Convert to fraction form
    21,007.70/28,989.87 = 11,576.30/x
  3. Step 3: Cross multiply
    21,007.70x = 28,989.87 × 11,576.30
  4. Step 4: Simplify right side
    21,007.70x = 335,595,432.08
  5. Step 5: Solve for x
    x = 335,595,432.08/21,007.70
  6. Step 6: Final answer
    x = 15,974.88

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1.5x scale

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.