Home / 21,161.10-31,742.11-7,834.76

Finding the Fourth Proportional to 21,161.10, 31,742.11 and 7,834.76

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Solution

The fourth proportional to 21,161.10, 31,742.11 and 7,834.76 is: 11,752.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.10 : 31,742.11 = 7,834.76 : x
  2. Step 2: Convert to fraction form
    21,161.10/31,742.11 = 7,834.76/x
  3. Step 3: Cross multiply
    21,161.10x = 31,742.11 × 7,834.76
  4. Step 4: Simplify right side
    21,161.10x = 248,691,635.45
  5. Step 5: Solve for x
    x = 248,691,635.45/21,161.10
  6. Step 6: Final answer
    x = 11,752.30

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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.