Home / 7,990.12-11,985.20-4,092.40

Finding the Fourth Proportional to 7,990.12, 11,985.20 and 4,092.40

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Solution

The fourth proportional to 7,990.12, 11,985.20 and 4,092.40 is: 6,138.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.12 : 11,985.20 = 4,092.40 : x
  2. Step 2: Convert to fraction form
    7,990.12/11,985.20 = 4,092.40/x
  3. Step 3: Cross multiply
    7,990.12x = 11,985.20 × 4,092.40
  4. Step 4: Simplify right side
    7,990.12x = 49,048,232.48
  5. Step 5: Solve for x
    x = 49,048,232.48/7,990.12
  6. Step 6: Final answer
    x = 6,138.61

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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.