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Finding the Fourth Proportional to 18,100.92, 24,978.81 and 10,143.66

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Solution

The fourth proportional to 18,100.92, 24,978.81 and 10,143.66 is: 13,997.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,100.92 : 24,978.81 = 10,143.66 : x
  2. Step 2: Convert to fraction form
    18,100.92/24,978.81 = 10,143.66/x
  3. Step 3: Cross multiply
    18,100.92x = 24,978.81 × 10,143.66
  4. Step 4: Simplify right side
    18,100.92x = 253,376,555.84
  5. Step 5: Solve for x
    x = 253,376,555.84/18,100.92
  6. Step 6: Final answer
    x = 13,997.99

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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.