Home / 20,809.50-31,225.58-7,659.96

Finding the Fourth Proportional to 20,809.50, 31,225.58 and 7,659.96

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Solution

The fourth proportional to 20,809.50, 31,225.58 and 7,659.96 is: 11,494.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.50 : 31,225.58 = 7,659.96 : x
  2. Step 2: Convert to fraction form
    20,809.50/31,225.58 = 7,659.96/x
  3. Step 3: Cross multiply
    20,809.50x = 31,225.58 × 7,659.96
  4. Step 4: Simplify right side
    20,809.50x = 239,186,693.78
  5. Step 5: Solve for x
    x = 239,186,693.78/20,809.50
  6. Step 6: Final answer
    x = 11,494.11

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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.