Home / 5,121.56-7,678.95-2,001.86

Finding the Fourth Proportional to 5,121.56, 7,678.95 and 2,001.86

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Solution

The fourth proportional to 5,121.56, 7,678.95 and 2,001.86 is: 3,001.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.56 : 7,678.95 = 2,001.86 : x
  2. Step 2: Convert to fraction form
    5,121.56/7,678.95 = 2,001.86/x
  3. Step 3: Cross multiply
    5,121.56x = 7,678.95 × 2,001.86
  4. Step 4: Simplify right side
    5,121.56x = 15,372,144.45
  5. Step 5: Solve for x
    x = 15,372,144.45/5,121.56
  6. Step 6: Final answer
    x = 3,001.46

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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.