Home / 21,274.11-31,911.17-8,127.81

Finding the Fourth Proportional to 21,274.11, 31,911.17 and 8,127.81

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Solution

The fourth proportional to 21,274.11, 31,911.17 and 8,127.81 is: 12,191.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,274.11 : 31,911.17 = 8,127.81 : x
  2. Step 2: Convert to fraction form
    21,274.11/31,911.17 = 8,127.81/x
  3. Step 3: Cross multiply
    21,274.11x = 31,911.17 × 8,127.81
  4. Step 4: Simplify right side
    21,274.11x = 259,367,886.00
  5. Step 5: Solve for x
    x = 259,367,886.00/21,274.11
  6. Step 6: Final answer
    x = 12,191.72

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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.