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Finding the Fourth Proportional to 8,915.40, 12,302.64 and 4,936.14

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Solution

The fourth proportional to 8,915.40, 12,302.64 and 4,936.14 is: 6,811.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.40 : 12,302.64 = 4,936.14 : x
  2. Step 2: Convert to fraction form
    8,915.40/12,302.64 = 4,936.14/x
  3. Step 3: Cross multiply
    8,915.40x = 12,302.64 × 4,936.14
  4. Step 4: Simplify right side
    8,915.40x = 60,727,553.41
  5. Step 5: Solve for x
    x = 60,727,553.41/8,915.40
  6. Step 6: Final answer
    x = 6,811.53

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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.