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Finding the Fourth Proportional to 11,439.70, 15,786.02 and 6,403.06

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Solution

The fourth proportional to 11,439.70, 15,786.02 and 6,403.06 is: 8,835.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,439.70 : 15,786.02 = 6,403.06 : x
  2. Step 2: Convert to fraction form
    11,439.70/15,786.02 = 6,403.06/x
  3. Step 3: Cross multiply
    11,439.70x = 15,786.02 × 6,403.06
  4. Step 4: Simplify right side
    11,439.70x = 101,078,833.22
  5. Step 5: Solve for x
    x = 101,078,833.22/11,439.70
  6. Step 6: Final answer
    x = 8,835.79

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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.