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Finding the Fourth Proportional to 18,287.50, 25,236.94 and 9,904.18

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Solution

The fourth proportional to 18,287.50, 25,236.94 and 9,904.18 is: 13,667.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,287.50 : 25,236.94 = 9,904.18 : x
  2. Step 2: Convert to fraction form
    18,287.50/25,236.94 = 9,904.18/x
  3. Step 3: Cross multiply
    18,287.50x = 25,236.94 × 9,904.18
  4. Step 4: Simplify right side
    18,287.50x = 249,951,196.41
  5. Step 5: Solve for x
    x = 249,951,196.41/18,287.50
  6. Step 6: Final answer
    x = 13,667.87

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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.