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Finding the Fourth Proportional to 11,239.76, 16,856.76 and 7,729.04

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Solution

The fourth proportional to 11,239.76, 16,856.76 and 7,729.04 is: 11,591.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,239.76 : 16,856.76 = 7,729.04 : x
  2. Step 2: Convert to fraction form
    11,239.76/16,856.76 = 7,729.04/x
  3. Step 3: Cross multiply
    11,239.76x = 16,856.76 × 7,729.04
  4. Step 4: Simplify right side
    11,239.76x = 130,286,572.31
  5. Step 5: Solve for x
    x = 130,286,572.31/11,239.76
  6. Step 6: Final answer
    x = 11,591.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.