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Finding the Fourth Proportional to 12,143.77, 18,197.93 and 5,381.20

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Solution

The fourth proportional to 12,143.77, 18,197.93 and 5,381.20 is: 8,063.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.77 : 18,197.93 = 5,381.20 : x
  2. Step 2: Convert to fraction form
    12,143.77/18,197.93 = 5,381.20/x
  3. Step 3: Cross multiply
    12,143.77x = 18,197.93 × 5,381.20
  4. Step 4: Simplify right side
    12,143.77x = 97,926,700.92
  5. Step 5: Solve for x
    x = 97,926,700.92/12,143.77
  6. Step 6: Final answer
    x = 8,063.95

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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.