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Finding the Fourth Proportional to 18,311.91, 25,270.45 and 9,928.41

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Solution

The fourth proportional to 18,311.91, 25,270.45 and 9,928.41 is: 13,701.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,311.91 : 25,270.45 = 9,928.41 : x
  2. Step 2: Convert to fraction form
    18,311.91/25,270.45 = 9,928.41/x
  3. Step 3: Cross multiply
    18,311.91x = 25,270.45 × 9,928.41
  4. Step 4: Simplify right side
    18,311.91x = 250,895,268.90
  5. Step 5: Solve for x
    x = 250,895,268.90/18,311.91
  6. Step 6: Final answer
    x = 13,701.21

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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.