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Finding the Fourth Proportional to 8,485.36, 12,728.95 and 3,555.50

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Solution

The fourth proportional to 8,485.36, 12,728.95 and 3,555.50 is: 5,333.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.36 : 12,728.95 = 3,555.50 : x
  2. Step 2: Convert to fraction form
    8,485.36/12,728.95 = 3,555.50/x
  3. Step 3: Cross multiply
    8,485.36x = 12,728.95 × 3,555.50
  4. Step 4: Simplify right side
    8,485.36x = 45,257,709.19
  5. Step 5: Solve for x
    x = 45,257,709.19/8,485.36
  6. Step 6: Final answer
    x = 5,333.62

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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.