Home / 21,991.90-30,352.12-17,311.42

Finding the Fourth Proportional to 21,991.90, 30,352.12 and 17,311.42

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Solution

The fourth proportional to 21,991.90, 30,352.12 and 17,311.42 is: 23,892.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,991.90 : 30,352.12 = 17,311.42 : x
  2. Step 2: Convert to fraction form
    21,991.90/30,352.12 = 17,311.42/x
  3. Step 3: Cross multiply
    21,991.90x = 30,352.12 × 17,311.42
  4. Step 4: Simplify right side
    21,991.90x = 525,438,102.17
  5. Step 5: Solve for x
    x = 525,438,102.17/21,991.90
  6. Step 6: Final answer
    x = 23,892.35

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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.