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Finding the Fourth Proportional to 18,302.75, 25,257.80 and 9,919.25

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Solution

The fourth proportional to 18,302.75, 25,257.80 and 9,919.25 is: 13,688.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,302.75 : 25,257.80 = 9,919.25 : x
  2. Step 2: Convert to fraction form
    18,302.75/25,257.80 = 9,919.25/x
  3. Step 3: Cross multiply
    18,302.75x = 25,257.80 × 9,919.25
  4. Step 4: Simplify right side
    18,302.75x = 250,538,432.65
  5. Step 5: Solve for x
    x = 250,538,432.65/18,302.75
  6. Step 6: Final answer
    x = 13,688.57

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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.