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Finding the Fourth Proportional to 21,656.44, 29,886.18 and 11,720.44

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Solution

The fourth proportional to 21,656.44, 29,886.18 and 11,720.44 is: 16,174.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,656.44 : 29,886.18 = 11,720.44 : x
  2. Step 2: Convert to fraction form
    21,656.44/29,886.18 = 11,720.44/x
  3. Step 3: Cross multiply
    21,656.44x = 29,886.18 × 11,720.44
  4. Step 4: Simplify right side
    21,656.44x = 350,279,179.52
  5. Step 5: Solve for x
    x = 350,279,179.52/21,656.44
  6. Step 6: Final answer
    x = 16,174.37

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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.