Home / 21,279.12-31,911.93-7,236.65

Finding the Fourth Proportional to 21,279.12, 31,911.93 and 7,236.65

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Solution

The fourth proportional to 21,279.12, 31,911.93 and 7,236.65 is: 10,852.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.12 : 31,911.93 = 7,236.65 : x
  2. Step 2: Convert to fraction form
    21,279.12/31,911.93 = 7,236.65/x
  3. Step 3: Cross multiply
    21,279.12x = 31,911.93 × 7,236.65
  4. Step 4: Simplify right side
    21,279.12x = 230,935,308.67
  5. Step 5: Solve for x
    x = 230,935,308.67/21,279.12
  6. Step 6: Final answer
    x = 10,852.67

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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.