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Finding the Fourth Proportional to 18,311.59, 25,269.91 and 9,928.09

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Solution

The fourth proportional to 18,311.59, 25,269.91 and 9,928.09 is: 13,700.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,311.59 : 25,269.91 = 9,928.09 : x
  2. Step 2: Convert to fraction form
    18,311.59/25,269.91 = 9,928.09/x
  3. Step 3: Cross multiply
    18,311.59x = 25,269.91 × 9,928.09
  4. Step 4: Simplify right side
    18,311.59x = 250,881,940.77
  5. Step 5: Solve for x
    x = 250,881,940.77/18,311.59
  6. Step 6: Final answer
    x = 13,700.72

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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.