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Finding the Fourth Proportional to 11,615.58, 17,427.39 and 8,455.95

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Solution

The fourth proportional to 11,615.58, 17,427.39 and 8,455.95 is: 12,686.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,615.58 : 17,427.39 = 8,455.95 : x
  2. Step 2: Convert to fraction form
    11,615.58/17,427.39 = 8,455.95/x
  3. Step 3: Cross multiply
    11,615.58x = 17,427.39 × 8,455.95
  4. Step 4: Simplify right side
    11,615.58x = 147,365,138.47
  5. Step 5: Solve for x
    x = 147,365,138.47/11,615.58
  6. Step 6: Final answer
    x = 12,686.85

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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.