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Finding the Fourth Proportional to 13,632.54, 18,808.11 and 8,915.10

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Solution

The fourth proportional to 13,632.54, 18,808.11 and 8,915.10 is: 12,299.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,632.54 : 18,808.11 = 8,915.10 : x
  2. Step 2: Convert to fraction form
    13,632.54/18,808.11 = 8,915.10/x
  3. Step 3: Cross multiply
    13,632.54x = 18,808.11 × 8,915.10
  4. Step 4: Simplify right side
    13,632.54x = 167,676,181.46
  5. Step 5: Solve for x
    x = 167,676,181.46/13,632.54
  6. Step 6: Final answer
    x = 12,299.70

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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.