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Finding the Fourth Proportional to 18,856.35, 28,290.66 and 8,994.34

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Solution

The fourth proportional to 18,856.35, 28,290.66 and 8,994.34 is: 13,494.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,856.35 : 28,290.66 = 8,994.34 : x
  2. Step 2: Convert to fraction form
    18,856.35/28,290.66 = 8,994.34/x
  3. Step 3: Cross multiply
    18,856.35x = 28,290.66 × 8,994.34
  4. Step 4: Simplify right side
    18,856.35x = 254,455,814.86
  5. Step 5: Solve for x
    x = 254,455,814.86/18,856.35
  6. Step 6: Final answer
    x = 13,494.44

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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.