Home / 21,008.01-28,989.74-11,576.57

Finding the Fourth Proportional to 21,008.01, 28,989.74 and 11,576.57

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Solution

The fourth proportional to 21,008.01, 28,989.74 and 11,576.57 is: 15,974.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.01 : 28,989.74 = 11,576.57 : x
  2. Step 2: Convert to fraction form
    21,008.01/28,989.74 = 11,576.57/x
  3. Step 3: Cross multiply
    21,008.01x = 28,989.74 × 11,576.57
  4. Step 4: Simplify right side
    21,008.01x = 335,601,551.56
  5. Step 5: Solve for x
    x = 335,601,551.56/21,008.01
  6. Step 6: Final answer
    x = 15,974.93

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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.