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Finding the Fourth Proportional to 11,375.40, 15,697.89 and 6,339.81

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Solution

The fourth proportional to 11,375.40, 15,697.89 and 6,339.81 is: 8,748.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,375.40 : 15,697.89 = 6,339.81 : x
  2. Step 2: Convert to fraction form
    11,375.40/15,697.89 = 6,339.81/x
  3. Step 3: Cross multiply
    11,375.40x = 15,697.89 × 6,339.81
  4. Step 4: Simplify right side
    11,375.40x = 99,521,640.00
  5. Step 5: Solve for x
    x = 99,521,640.00/11,375.40
  6. Step 6: Final answer
    x = 8,748.85

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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.