Home / 21,115.44-29,137.86-11,684.34

Finding the Fourth Proportional to 21,115.44, 29,137.86 and 11,684.34

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Solution

The fourth proportional to 21,115.44, 29,137.86 and 11,684.34 is: 16,123.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.44 : 29,137.86 = 11,684.34 : x
  2. Step 2: Convert to fraction form
    21,115.44/29,137.86 = 11,684.34/x
  3. Step 3: Cross multiply
    21,115.44x = 29,137.86 × 11,684.34
  4. Step 4: Simplify right side
    21,115.44x = 340,456,663.11
  5. Step 5: Solve for x
    x = 340,456,663.11/21,115.44
  6. Step 6: Final answer
    x = 16,123.59

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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.