Home / 13,791.75-20,688.85-5,358.05

Finding the Fourth Proportional to 13,791.75, 20,688.85 and 5,358.05

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Solution

The fourth proportional to 13,791.75, 20,688.85 and 5,358.05 is: 8,037.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.75 : 20,688.85 = 5,358.05 : x
  2. Step 2: Convert to fraction form
    13,791.75/20,688.85 = 5,358.05/x
  3. Step 3: Cross multiply
    13,791.75x = 20,688.85 × 5,358.05
  4. Step 4: Simplify right side
    13,791.75x = 110,851,892.74
  5. Step 5: Solve for x
    x = 110,851,892.74/13,791.75
  6. Step 6: Final answer
    x = 8,037.55

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1.5x scale

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.