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Finding the Fourth Proportional to 8,915.28, 12,326.57 and 7,808.11

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Solution

The fourth proportional to 8,915.28, 12,326.57 and 7,808.11 is: 10,795.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.28 : 12,326.57 = 7,808.11 : x
  2. Step 2: Convert to fraction form
    8,915.28/12,326.57 = 7,808.11/x
  3. Step 3: Cross multiply
    8,915.28x = 12,326.57 × 7,808.11
  4. Step 4: Simplify right side
    8,915.28x = 96,247,113.81
  5. Step 5: Solve for x
    x = 96,247,113.81/8,915.28
  6. Step 6: Final answer
    x = 10,795.75

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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.