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Finding the Fourth Proportional to 13,617.53, 18,793.95 and 7,649.20

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Solution

The fourth proportional to 13,617.53, 18,793.95 and 7,649.20 is: 10,556.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,617.53 : 18,793.95 = 7,649.20 : x
  2. Step 2: Convert to fraction form
    13,617.53/18,793.95 = 7,649.20/x
  3. Step 3: Cross multiply
    13,617.53x = 18,793.95 × 7,649.20
  4. Step 4: Simplify right side
    13,617.53x = 143,758,550.12
  5. Step 5: Solve for x
    x = 143,758,550.12/13,617.53
  6. Step 6: Final answer
    x = 10,556.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.