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Finding the Fourth Proportional to 8,333.40, 12,485.70 and 5,410.20

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Solution

The fourth proportional to 8,333.40, 12,485.70 and 5,410.20 is: 8,105.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,333.40 : 12,485.70 = 5,410.20 : x
  2. Step 2: Convert to fraction form
    8,333.40/12,485.70 = 5,410.20/x
  3. Step 3: Cross multiply
    8,333.40x = 12,485.70 × 5,410.20
  4. Step 4: Simplify right side
    8,333.40x = 67,550,134.14
  5. Step 5: Solve for x
    x = 67,550,134.14/8,333.40
  6. Step 6: Final answer
    x = 8,105.95

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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.