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Finding the Fourth Proportional to 27,168.55, 40,698.15 and 18,311.20

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Solution

The fourth proportional to 27,168.55, 40,698.15 and 18,311.20 is: 27,429.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,168.55 : 40,698.15 = 18,311.20 : x
  2. Step 2: Convert to fraction form
    27,168.55/40,698.15 = 18,311.20/x
  3. Step 3: Cross multiply
    27,168.55x = 40,698.15 × 18,311.20
  4. Step 4: Simplify right side
    27,168.55x = 745,231,964.28
  5. Step 5: Solve for x
    x = 745,231,964.28/27,168.55
  6. Step 6: Final answer
    x = 27,429.95

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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.