Home / 20,974.71-31,434.39-11,111.34

Finding the Fourth Proportional to 20,974.71, 31,434.39 and 11,111.34

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Solution

The fourth proportional to 20,974.71, 31,434.39 and 11,111.34 is: 16,652.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,974.71 : 31,434.39 = 11,111.34 : x
  2. Step 2: Convert to fraction form
    20,974.71/31,434.39 = 11,111.34/x
  3. Step 3: Cross multiply
    20,974.71x = 31,434.39 × 11,111.34
  4. Step 4: Simplify right side
    20,974.71x = 349,278,194.98
  5. Step 5: Solve for x
    x = 349,278,194.98/20,974.71
  6. Step 6: Final answer
    x = 16,652.35

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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.