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Finding the Fourth Proportional to 18,271.92, 27,409.20 and 5,125.20

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Solution

The fourth proportional to 18,271.92, 27,409.20 and 5,125.20 is: 7,688.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,271.92 : 27,409.20 = 5,125.20 : x
  2. Step 2: Convert to fraction form
    18,271.92/27,409.20 = 5,125.20/x
  3. Step 3: Cross multiply
    18,271.92x = 27,409.20 × 5,125.20
  4. Step 4: Simplify right side
    18,271.92x = 140,477,631.84
  5. Step 5: Solve for x
    x = 140,477,631.84/18,271.92
  6. Step 6: Final answer
    x = 7,688.17

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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.