Home / 20,134.78-30,214.04-7,665.29

Finding the Fourth Proportional to 20,134.78, 30,214.04 and 7,665.29

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Solution

The fourth proportional to 20,134.78, 30,214.04 and 7,665.29 is: 11,502.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,134.78 : 30,214.04 = 7,665.29 : x
  2. Step 2: Convert to fraction form
    20,134.78/30,214.04 = 7,665.29/x
  3. Step 3: Cross multiply
    20,134.78x = 30,214.04 × 7,665.29
  4. Step 4: Simplify right side
    20,134.78x = 231,599,378.67
  5. Step 5: Solve for x
    x = 231,599,378.67/20,134.78
  6. Step 6: Final answer
    x = 11,502.45

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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.