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Finding the Fourth Proportional to 18,770.54, 28,131.10 and 10,454.47

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Solution

The fourth proportional to 18,770.54, 28,131.10 and 10,454.47 is: 15,667.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,770.54 : 28,131.10 = 10,454.47 : x
  2. Step 2: Convert to fraction form
    18,770.54/28,131.10 = 10,454.47/x
  3. Step 3: Cross multiply
    18,770.54x = 28,131.10 × 10,454.47
  4. Step 4: Simplify right side
    18,770.54x = 294,095,644.55
  5. Step 5: Solve for x
    x = 294,095,644.55/18,770.54
  6. Step 6: Final answer
    x = 15,667.94

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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.