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Finding the Fourth Proportional to 8,615.58, 11,886.39 and 4,887.42

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Solution

The fourth proportional to 8,615.58, 11,886.39 and 4,887.42 is: 6,742.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.58 : 11,886.39 = 4,887.42 : x
  2. Step 2: Convert to fraction form
    8,615.58/11,886.39 = 4,887.42/x
  3. Step 3: Cross multiply
    8,615.58x = 11,886.39 × 4,887.42
  4. Step 4: Simplify right side
    8,615.58x = 58,093,780.21
  5. Step 5: Solve for x
    x = 58,093,780.21/8,615.58
  6. Step 6: Final answer
    x = 6,742.88

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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.