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Finding the Fourth Proportional to 18,816.98, 25,967.92 and 10,639.92

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Solution

The fourth proportional to 18,816.98, 25,967.92 and 10,639.92 is: 14,683.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816.98 : 25,967.92 = 10,639.92 : x
  2. Step 2: Convert to fraction form
    18,816.98/25,967.92 = 10,639.92/x
  3. Step 3: Cross multiply
    18,816.98x = 25,967.92 × 10,639.92
  4. Step 4: Simplify right side
    18,816.98x = 276,296,591.37
  5. Step 5: Solve for x
    x = 276,296,591.37/18,816.98
  6. Step 6: Final answer
    x = 14,683.37

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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.