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Finding the Fourth Proportional to 10,143.55, 13,944.36 and 8,722.03

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Solution

The fourth proportional to 10,143.55, 13,944.36 and 8,722.03 is: 11,990.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,143.55 : 13,944.36 = 8,722.03 : x
  2. Step 2: Convert to fraction form
    10,143.55/13,944.36 = 8,722.03/x
  3. Step 3: Cross multiply
    10,143.55x = 13,944.36 × 8,722.03
  4. Step 4: Simplify right side
    10,143.55x = 121,623,126.25
  5. Step 5: Solve for x
    x = 121,623,126.25/10,143.55
  6. Step 6: Final answer
    x = 11,990.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.