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Finding the Fourth Proportional to 13,504.08, 18,635.72 and 7,915.12

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Solution

The fourth proportional to 13,504.08, 18,635.72 and 7,915.12 is: 10,922.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,504.08 : 18,635.72 = 7,915.12 : x
  2. Step 2: Convert to fraction form
    13,504.08/18,635.72 = 7,915.12/x
  3. Step 3: Cross multiply
    13,504.08x = 18,635.72 × 7,915.12
  4. Step 4: Simplify right side
    13,504.08x = 147,503,960.09
  5. Step 5: Solve for x
    x = 147,503,960.09/13,504.08
  6. Step 6: Final answer
    x = 10,922.92

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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.