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Finding the Fourth Proportional to 18,774.98, 28,161.90 and 6,124.70

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Solution

The fourth proportional to 18,774.98, 28,161.90 and 6,124.70 is: 9,186.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.98 : 28,161.90 = 6,124.70 : x
  2. Step 2: Convert to fraction form
    18,774.98/28,161.90 = 6,124.70/x
  3. Step 3: Cross multiply
    18,774.98x = 28,161.90 × 6,124.70
  4. Step 4: Simplify right side
    18,774.98x = 172,483,188.93
  5. Step 5: Solve for x
    x = 172,483,188.93/18,774.98
  6. Step 6: Final answer
    x = 9,186.86

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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.