Home / 5,154.78-7,720.65-2,686.62

Finding the Fourth Proportional to 5,154.78, 7,720.65 and 2,686.62

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Solution

The fourth proportional to 5,154.78, 7,720.65 and 2,686.62 is: 4,023.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,154.78 : 7,720.65 = 2,686.62 : x
  2. Step 2: Convert to fraction form
    5,154.78/7,720.65 = 2,686.62/x
  3. Step 3: Cross multiply
    5,154.78x = 7,720.65 × 2,686.62
  4. Step 4: Simplify right side
    5,154.78x = 20,742,452.70
  5. Step 5: Solve for x
    x = 20,742,452.70/5,154.78
  6. Step 6: Final answer
    x = 4,023.93

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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.