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Finding the Fourth Proportional to 8,615.35, 11,890.49 and 5,260.12

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Solution

The fourth proportional to 8,615.35, 11,890.49 and 5,260.12 is: 7,259.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.35 : 11,890.49 = 5,260.12 : x
  2. Step 2: Convert to fraction form
    8,615.35/11,890.49 = 5,260.12/x
  3. Step 3: Cross multiply
    8,615.35x = 11,890.49 × 5,260.12
  4. Step 4: Simplify right side
    8,615.35x = 62,545,404.26
  5. Step 5: Solve for x
    x = 62,545,404.26/8,615.35
  6. Step 6: Final answer
    x = 7,259.76

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Similar ratio
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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.