Home / 5,119.00-7,678.65-1,421.50

Finding the Fourth Proportional to 5,119.00, 7,678.65 and 1,421.50

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Solution

The fourth proportional to 5,119.00, 7,678.65 and 1,421.50 is: 2,132.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,119.00 : 7,678.65 = 1,421.50 : x
  2. Step 2: Convert to fraction form
    5,119.00/7,678.65 = 1,421.50/x
  3. Step 3: Cross multiply
    5,119.00x = 7,678.65 × 1,421.50
  4. Step 4: Simplify right side
    5,119.00x = 10,915,200.09
  5. Step 5: Solve for x
    x = 10,915,200.09/5,119.00
  6. Step 6: Final answer
    x = 2,132.29

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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.