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Finding the Fourth Proportional to 11,187.56, 15,439.28 and 6,709.68

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Solution

The fourth proportional to 11,187.56, 15,439.28 and 6,709.68 is: 9,259.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,187.56 : 15,439.28 = 6,709.68 : x
  2. Step 2: Convert to fraction form
    11,187.56/15,439.28 = 6,709.68/x
  3. Step 3: Cross multiply
    11,187.56x = 15,439.28 × 6,709.68
  4. Step 4: Simplify right side
    11,187.56x = 103,592,645.00
  5. Step 5: Solve for x
    x = 103,592,645.00/11,187.56
  6. Step 6: Final answer
    x = 9,259.63

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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.