Home / 21,191.36-31,790.24-6,401.48

Finding the Fourth Proportional to 21,191.36, 31,790.24 and 6,401.48

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Solution

The fourth proportional to 21,191.36, 31,790.24 and 6,401.48 is: 9,603.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.36 : 31,790.24 = 6,401.48 : x
  2. Step 2: Convert to fraction form
    21,191.36/31,790.24 = 6,401.48/x
  3. Step 3: Cross multiply
    21,191.36x = 31,790.24 × 6,401.48
  4. Step 4: Simplify right side
    21,191.36x = 203,504,394.60
  5. Step 5: Solve for x
    x = 203,504,394.60/21,191.36
  6. Step 6: Final answer
    x = 9,603.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.