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Finding the Fourth Proportional to 18,246.78, 25,185.30 and 11,890.80

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Solution

The fourth proportional to 18,246.78, 25,185.30 and 11,890.80 is: 16,412.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,246.78 : 25,185.30 = 11,890.80 : x
  2. Step 2: Convert to fraction form
    18,246.78/25,185.30 = 11,890.80/x
  3. Step 3: Cross multiply
    18,246.78x = 25,185.30 × 11,890.80
  4. Step 4: Simplify right side
    18,246.78x = 299,473,365.24
  5. Step 5: Solve for x
    x = 299,473,365.24/18,246.78
  6. Step 6: Final answer
    x = 16,412.40

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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.