Home / 21,002.76-31,504.68-7,161.48

Finding the Fourth Proportional to 21,002.76, 31,504.68 and 7,161.48

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Solution

The fourth proportional to 21,002.76, 31,504.68 and 7,161.48 is: 10,742.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.76 : 31,504.68 = 7,161.48 : x
  2. Step 2: Convert to fraction form
    21,002.76/31,504.68 = 7,161.48/x
  3. Step 3: Cross multiply
    21,002.76x = 31,504.68 × 7,161.48
  4. Step 4: Simplify right side
    21,002.76x = 225,620,135.73
  5. Step 5: Solve for x
    x = 225,620,135.73/21,002.76
  6. Step 6: Final answer
    x = 10,742.40

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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.