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Finding the Fourth Proportional to 8,915.76, 12,327.22 and 7,808.58

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Solution

The fourth proportional to 8,915.76, 12,327.22 and 7,808.58 is: 10,796.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.76 : 12,327.22 = 7,808.58 : x
  2. Step 2: Convert to fraction form
    8,915.76/12,327.22 = 7,808.58/x
  3. Step 3: Cross multiply
    8,915.76x = 12,327.22 × 7,808.58
  4. Step 4: Simplify right side
    8,915.76x = 96,258,083.55
  5. Step 5: Solve for x
    x = 96,258,083.55/8,915.76
  6. Step 6: Final answer
    x = 10,796.40

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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.