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Finding the Fourth Proportional to 13,988.81, 20,997.80 and 6,203.09

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Solution

The fourth proportional to 13,988.81, 20,997.80 and 6,203.09 is: 9,311.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,988.81 : 20,997.80 = 6,203.09 : x
  2. Step 2: Convert to fraction form
    13,988.81/20,997.80 = 6,203.09/x
  3. Step 3: Cross multiply
    13,988.81x = 20,997.80 × 6,203.09
  4. Step 4: Simplify right side
    13,988.81x = 130,251,243.20
  5. Step 5: Solve for x
    x = 130,251,243.20/13,988.81
  6. Step 6: Final answer
    x = 9,311.10

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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.