Home / 13,442.76-20,150.64-5,120.64

Finding the Fourth Proportional to 13,442.76, 20,150.64 and 5,120.64

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Solution

The fourth proportional to 13,442.76, 20,150.64 and 5,120.64 is: 7,675.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,442.76 : 20,150.64 = 5,120.64 : x
  2. Step 2: Convert to fraction form
    13,442.76/20,150.64 = 5,120.64/x
  3. Step 3: Cross multiply
    13,442.76x = 20,150.64 × 5,120.64
  4. Step 4: Simplify right side
    13,442.76x = 103,184,173.21
  5. Step 5: Solve for x
    x = 103,184,173.21/13,442.76
  6. Step 6: Final answer
    x = 7,675.82

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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.