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Finding the Fourth Proportional to 9,887.10, 13,644.14 and 5,410.78

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Solution

The fourth proportional to 9,887.10, 13,644.14 and 5,410.78 is: 7,466.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,887.10 : 13,644.14 = 5,410.78 : x
  2. Step 2: Convert to fraction form
    9,887.10/13,644.14 = 5,410.78/x
  3. Step 3: Cross multiply
    9,887.10x = 13,644.14 × 5,410.78
  4. Step 4: Simplify right side
    9,887.10x = 73,825,439.83
  5. Step 5: Solve for x
    x = 73,825,439.83/9,887.10
  6. Step 6: Final answer
    x = 7,466.84

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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.