Home / 15,539.78-21,426.07-12,091.36

Finding the Fourth Proportional to 15,539.78, 21,426.07 and 12,091.36

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Solution

The fourth proportional to 15,539.78, 21,426.07 and 12,091.36 is: 16,671.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,539.78 : 21,426.07 = 12,091.36 : x
  2. Step 2: Convert to fraction form
    15,539.78/21,426.07 = 12,091.36/x
  3. Step 3: Cross multiply
    15,539.78x = 21,426.07 × 12,091.36
  4. Step 4: Simplify right side
    15,539.78x = 259,070,241.96
  5. Step 5: Solve for x
    x = 259,070,241.96/15,539.78
  6. Step 6: Final answer
    x = 16,671.42

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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.