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Finding the Fourth Proportional to 30,166.40, 45,249.60 and 8,278.40

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Solution

The fourth proportional to 30,166.40, 45,249.60 and 8,278.40 is: 12,417.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,166.40 : 45,249.60 = 8,278.40 : x
  2. Step 2: Convert to fraction form
    30,166.40/45,249.60 = 8,278.40/x
  3. Step 3: Cross multiply
    30,166.40x = 45,249.60 × 8,278.40
  4. Step 4: Simplify right side
    30,166.40x = 374,594,288.64
  5. Step 5: Solve for x
    x = 374,594,288.64/30,166.40
  6. Step 6: Final answer
    x = 12,417.60

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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.