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Finding the Fourth Proportional to 13,599.90, 20,400.08 and 3,739.10

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Solution

The fourth proportional to 13,599.90, 20,400.08 and 3,739.10 is: 5,608.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,599.90 : 20,400.08 = 3,739.10 : x
  2. Step 2: Convert to fraction form
    13,599.90/20,400.08 = 3,739.10/x
  3. Step 3: Cross multiply
    13,599.90x = 20,400.08 × 3,739.10
  4. Step 4: Simplify right side
    13,599.90x = 76,277,939.13
  5. Step 5: Solve for x
    x = 76,277,939.13/13,599.90
  6. Step 6: Final answer
    x = 5,608.71

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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.