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Finding the Fourth Proportional to 18,999.50, 28,483.90 and 7,914.53

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Solution

The fourth proportional to 18,999.50, 28,483.90 and 7,914.53 is: 11,865.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.50 : 28,483.90 = 7,914.53 : x
  2. Step 2: Convert to fraction form
    18,999.50/28,483.90 = 7,914.53/x
  3. Step 3: Cross multiply
    18,999.50x = 28,483.90 × 7,914.53
  4. Step 4: Simplify right side
    18,999.50x = 225,436,732.49
  5. Step 5: Solve for x
    x = 225,436,732.49/18,999.50
  6. Step 6: Final answer
    x = 11,865.41

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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.