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Finding the Fourth Proportional to 10,889.76, 15,027.86 and 5,921.76

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Solution

The fourth proportional to 10,889.76, 15,027.86 and 5,921.76 is: 8,172.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,889.76 : 15,027.86 = 5,921.76 : x
  2. Step 2: Convert to fraction form
    10,889.76/15,027.86 = 5,921.76/x
  3. Step 3: Cross multiply
    10,889.76x = 15,027.86 × 5,921.76
  4. Step 4: Simplify right side
    10,889.76x = 88,991,380.23
  5. Step 5: Solve for x
    x = 88,991,380.23/10,889.76
  6. Step 6: Final answer
    x = 8,172.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.