Home / 5,128.48-7,688.17-2,007.78

Finding the Fourth Proportional to 5,128.48, 7,688.17 and 2,007.78

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Solution

The fourth proportional to 5,128.48, 7,688.17 and 2,007.78 is: 3,009.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.48 : 7,688.17 = 2,007.78 : x
  2. Step 2: Convert to fraction form
    5,128.48/7,688.17 = 2,007.78/x
  3. Step 3: Cross multiply
    5,128.48x = 7,688.17 × 2,007.78
  4. Step 4: Simplify right side
    5,128.48x = 15,436,153.96
  5. Step 5: Solve for x
    x = 15,436,153.96/5,128.48
  6. Step 6: Final answer
    x = 3,009.89

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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.