Home / 19,815.12-27,344.64-11,431.44

Finding the Fourth Proportional to 19,815.12, 27,344.64 and 11,431.44

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Solution

The fourth proportional to 19,815.12, 27,344.64 and 11,431.44 is: 15,775.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,815.12 : 27,344.64 = 11,431.44 : x
  2. Step 2: Convert to fraction form
    19,815.12/27,344.64 = 11,431.44/x
  3. Step 3: Cross multiply
    19,815.12x = 27,344.64 × 11,431.44
  4. Step 4: Simplify right side
    19,815.12x = 312,588,611.48
  5. Step 5: Solve for x
    x = 312,588,611.48/19,815.12
  6. Step 6: Final answer
    x = 15,775.26

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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.