Home / 20,109.60-30,163.32-5,319

Finding the Fourth Proportional to 20,109.60, 30,163.32 and 5,319

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Solution

The fourth proportional to 20,109.60, 30,163.32 and 5,319 is: 7,978.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.60 : 30,163.32 = 5,319 : x
  2. Step 2: Convert to fraction form
    20,109.60/30,163.32 = 5,319/x
  3. Step 3: Cross multiply
    20,109.60x = 30,163.32 × 5,319
  4. Step 4: Simplify right side
    20,109.60x = 160,438,699.08
  5. Step 5: Solve for x
    x = 160,438,699.08/20,109.60
  6. Step 6: Final answer
    x = 7,978.21

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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.