Home / 28,181.40-38,891.64-15,606.42

Finding the Fourth Proportional to 28,181.40, 38,891.64 and 15,606.42

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Solution

The fourth proportional to 28,181.40, 38,891.64 and 15,606.42 is: 21,537.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,181.40 : 38,891.64 = 15,606.42 : x
  2. Step 2: Convert to fraction form
    28,181.40/38,891.64 = 15,606.42/x
  3. Step 3: Cross multiply
    28,181.40x = 38,891.64 × 15,606.42
  4. Step 4: Simplify right side
    28,181.40x = 606,959,268.33
  5. Step 5: Solve for x
    x = 606,959,268.33/28,181.40
  6. Step 6: Final answer
    x = 21,537.58

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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.