Home / 21,686.44-29,926.38-12,255.36

Finding the Fourth Proportional to 21,686.44, 29,926.38 and 12,255.36

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Solution

The fourth proportional to 21,686.44, 29,926.38 and 12,255.36 is: 16,911.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,686.44 : 29,926.38 = 12,255.36 : x
  2. Step 2: Convert to fraction form
    21,686.44/29,926.38 = 12,255.36/x
  3. Step 3: Cross multiply
    21,686.44x = 29,926.38 × 12,255.36
  4. Step 4: Simplify right side
    21,686.44x = 366,758,560.40
  5. Step 5: Solve for x
    x = 366,758,560.40/21,686.44
  6. Step 6: Final answer
    x = 16,911.88

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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.