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Finding the Fourth Proportional to 13,603.20, 20,395.20 and 7,016.64

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Solution

The fourth proportional to 13,603.20, 20,395.20 and 7,016.64 is: 10,520.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,603.20 : 20,395.20 = 7,016.64 : x
  2. Step 2: Convert to fraction form
    13,603.20/20,395.20 = 7,016.64/x
  3. Step 3: Cross multiply
    13,603.20x = 20,395.20 × 7,016.64
  4. Step 4: Simplify right side
    13,603.20x = 143,105,776.13
  5. Step 5: Solve for x
    x = 143,105,776.13/13,603.20
  6. Step 6: Final answer
    x = 10,520.01

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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.