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Finding the Fourth Proportional to 8,615.78, 11,881.02 and 8,113.50

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Solution

The fourth proportional to 8,615.78, 11,881.02 and 8,113.50 is: 11,188.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.78 : 11,881.02 = 8,113.50 : x
  2. Step 2: Convert to fraction form
    8,615.78/11,881.02 = 8,113.50/x
  3. Step 3: Cross multiply
    8,615.78x = 11,881.02 × 8,113.50
  4. Step 4: Simplify right side
    8,615.78x = 96,396,655.77
  5. Step 5: Solve for x
    x = 96,396,655.77/8,615.78
  6. Step 6: Final answer
    x = 11,188.39

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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.