Home / 21,338.91-29,447.72-11,907.47

Finding the Fourth Proportional to 21,338.91, 29,447.72 and 11,907.47

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Solution

The fourth proportional to 21,338.91, 29,447.72 and 11,907.47 is: 16,432.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.91 : 29,447.72 = 11,907.47 : x
  2. Step 2: Convert to fraction form
    21,338.91/29,447.72 = 11,907.47/x
  3. Step 3: Cross multiply
    21,338.91x = 29,447.72 × 11,907.47
  4. Step 4: Simplify right side
    21,338.91x = 350,647,635.69
  5. Step 5: Solve for x
    x = 350,647,635.69/21,338.91
  6. Step 6: Final answer
    x = 16,432.31

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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.