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Finding the Fourth Proportional to 18,487.40, 25,531.25 and 11,776.05

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Solution

The fourth proportional to 18,487.40, 25,531.25 and 11,776.05 is: 16,262.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,487.40 : 25,531.25 = 11,776.05 : x
  2. Step 2: Convert to fraction form
    18,487.40/25,531.25 = 11,776.05/x
  3. Step 3: Cross multiply
    18,487.40x = 25,531.25 × 11,776.05
  4. Step 4: Simplify right side
    18,487.40x = 300,657,217.68
  5. Step 5: Solve for x
    x = 300,657,217.68/18,487.40
  6. Step 6: Final answer
    x = 16,262.82

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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.