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Finding the Fourth Proportional to 18,887.34, 28,331 and 8,996.63

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Solution

The fourth proportional to 18,887.34, 28,331 and 8,996.63 is: 13,494.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,887.34 : 28,331 = 8,996.63 : x
  2. Step 2: Convert to fraction form
    18,887.34/28,331 = 8,996.63/x
  3. Step 3: Cross multiply
    18,887.34x = 28,331 × 8,996.63
  4. Step 4: Simplify right side
    18,887.34x = 254,883,524.53
  5. Step 5: Solve for x
    x = 254,883,524.53/18,887.34
  6. Step 6: Final answer
    x = 13,494.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.