Home / 21,150.72-31,737.60-11,917.44

Finding the Fourth Proportional to 21,150.72, 31,737.60 and 11,917.44

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Solution

The fourth proportional to 21,150.72, 31,737.60 and 11,917.44 is: 17,882.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,150.72 : 31,737.60 = 11,917.44 : x
  2. Step 2: Convert to fraction form
    21,150.72/31,737.60 = 11,917.44/x
  3. Step 3: Cross multiply
    21,150.72x = 31,737.60 × 11,917.44
  4. Step 4: Simplify right side
    21,150.72x = 378,230,943.74
  5. Step 5: Solve for x
    x = 378,230,943.74/21,150.72
  6. Step 6: Final answer
    x = 17,882.65

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1.5x scale

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.