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Finding the Fourth Proportional to 12,002.80, 18,004.20 and 10,909.30

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Solution

The fourth proportional to 12,002.80, 18,004.20 and 10,909.30 is: 16,363.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,002.80 : 18,004.20 = 10,909.30 : x
  2. Step 2: Convert to fraction form
    12,002.80/18,004.20 = 10,909.30/x
  3. Step 3: Cross multiply
    12,002.80x = 18,004.20 × 10,909.30
  4. Step 4: Simplify right side
    12,002.80x = 196,413,219.06
  5. Step 5: Solve for x
    x = 196,413,219.06/12,002.80
  6. Step 6: Final answer
    x = 16,363.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.