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Finding the Fourth Proportional to 13,632.28, 18,808.14 and 8,919.70

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Solution

The fourth proportional to 13,632.28, 18,808.14 and 8,919.70 is: 12,306.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,632.28 : 18,808.14 = 8,919.70 : x
  2. Step 2: Convert to fraction form
    13,632.28/18,808.14 = 8,919.70/x
  3. Step 3: Cross multiply
    13,632.28x = 18,808.14 × 8,919.70
  4. Step 4: Simplify right side
    13,632.28x = 167,762,966.36
  5. Step 5: Solve for x
    x = 167,762,966.36/13,632.28
  6. Step 6: Final answer
    x = 12,306.30

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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.