Home / 8,992.20-12,403.89-6,999.60

Finding the Fourth Proportional to 8,992.20, 12,403.89 and 6,999.60

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Solution

The fourth proportional to 8,992.20, 12,403.89 and 6,999.60 is: 9,655.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,992.20 : 12,403.89 = 6,999.60 : x
  2. Step 2: Convert to fraction form
    8,992.20/12,403.89 = 6,999.60/x
  3. Step 3: Cross multiply
    8,992.20x = 12,403.89 × 6,999.60
  4. Step 4: Simplify right side
    8,992.20x = 86,822,268.44
  5. Step 5: Solve for x
    x = 86,822,268.44/8,992.20
  6. Step 6: Final answer
    x = 9,655.29

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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.