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Finding the Fourth Proportional to 8,886.31, 13,329.46 and 7,858.42

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Solution

The fourth proportional to 8,886.31, 13,329.46 and 7,858.42 is: 11,787.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,886.31 : 13,329.46 = 7,858.42 : x
  2. Step 2: Convert to fraction form
    8,886.31/13,329.46 = 7,858.42/x
  3. Step 3: Cross multiply
    8,886.31x = 13,329.46 × 7,858.42
  4. Step 4: Simplify right side
    8,886.31x = 104,748,471.55
  5. Step 5: Solve for x
    x = 104,748,471.55/8,886.31
  6. Step 6: Final answer
    x = 11,787.63

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Similar ratio
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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.