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Finding the Fourth Proportional to 30,408.11, 45,612.01 and 8,221.40

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Solution

The fourth proportional to 30,408.11, 45,612.01 and 8,221.40 is: 12,332.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,408.11 : 45,612.01 = 8,221.40 : x
  2. Step 2: Convert to fraction form
    30,408.11/45,612.01 = 8,221.40/x
  3. Step 3: Cross multiply
    30,408.11x = 45,612.01 × 8,221.40
  4. Step 4: Simplify right side
    30,408.11x = 374,994,532.28
  5. Step 5: Solve for x
    x = 374,994,532.28/30,408.11
  6. Step 6: Final answer
    x = 12,332.06

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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.