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Finding the Fourth Proportional to 8,980.92, 12,399.80 and 5,625.12

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Solution

The fourth proportional to 8,980.92, 12,399.80 and 5,625.12 is: 7,766.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980.92 : 12,399.80 = 5,625.12 : x
  2. Step 2: Convert to fraction form
    8,980.92/12,399.80 = 5,625.12/x
  3. Step 3: Cross multiply
    8,980.92x = 12,399.80 × 5,625.12
  4. Step 4: Simplify right side
    8,980.92x = 69,750,362.98
  5. Step 5: Solve for x
    x = 69,750,362.98/8,980.92
  6. Step 6: Final answer
    x = 7,766.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.