Home / 20,631.06-30,927.48-7,479.90

Finding the Fourth Proportional to 20,631.06, 30,927.48 and 7,479.90

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Solution

The fourth proportional to 20,631.06, 30,927.48 and 7,479.90 is: 11,212.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.06 : 30,927.48 = 7,479.90 : x
  2. Step 2: Convert to fraction form
    20,631.06/30,927.48 = 7,479.90/x
  3. Step 3: Cross multiply
    20,631.06x = 30,927.48 × 7,479.90
  4. Step 4: Simplify right side
    20,631.06x = 231,334,457.65
  5. Step 5: Solve for x
    x = 231,334,457.65/20,631.06
  6. Step 6: Final answer
    x = 11,212.92

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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.