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Finding the Fourth Proportional to 13,699.38, 20,549.20 and 4,928.16

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Solution

The fourth proportional to 13,699.38, 20,549.20 and 4,928.16 is: 7,392.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,699.38 : 20,549.20 = 4,928.16 : x
  2. Step 2: Convert to fraction form
    13,699.38/20,549.20 = 4,928.16/x
  3. Step 3: Cross multiply
    13,699.38x = 20,549.20 × 4,928.16
  4. Step 4: Simplify right side
    13,699.38x = 101,269,745.47
  5. Step 5: Solve for x
    x = 101,269,745.47/13,699.38
  6. Step 6: Final answer
    x = 7,392.29

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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.