Home / 21,990.36-30,342.42-17,791.32

Finding the Fourth Proportional to 21,990.36, 30,342.42 and 17,791.32

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Solution

The fourth proportional to 21,990.36, 30,342.42 and 17,791.32 is: 24,548.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.36 : 30,342.42 = 17,791.32 : x
  2. Step 2: Convert to fraction form
    21,990.36/30,342.42 = 17,791.32/x
  3. Step 3: Cross multiply
    21,990.36x = 30,342.42 × 17,791.32
  4. Step 4: Simplify right side
    21,990.36x = 539,831,703.79
  5. Step 5: Solve for x
    x = 539,831,703.79/21,990.36
  6. Step 6: Final answer
    x = 24,548.56

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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.