Home / 15,361.36-21,191.83-12,540.39

Finding the Fourth Proportional to 15,361.36, 21,191.83 and 12,540.39

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Solution

The fourth proportional to 15,361.36, 21,191.83 and 12,540.39 is: 17,300.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,361.36 : 21,191.83 = 12,540.39 : x
  2. Step 2: Convert to fraction form
    15,361.36/21,191.83 = 12,540.39/x
  3. Step 3: Cross multiply
    15,361.36x = 21,191.83 × 12,540.39
  4. Step 4: Simplify right side
    15,361.36x = 265,753,781.66
  5. Step 5: Solve for x
    x = 265,753,781.66/15,361.36
  6. Step 6: Final answer
    x = 17,300.15

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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.