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Finding the Fourth Proportional to 7,985.08, 11,990.96 and 4,990.09

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Solution

The fourth proportional to 7,985.08, 11,990.96 and 4,990.09 is: 7,493.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985.08 : 11,990.96 = 4,990.09 : x
  2. Step 2: Convert to fraction form
    7,985.08/11,990.96 = 4,990.09/x
  3. Step 3: Cross multiply
    7,985.08x = 11,990.96 × 4,990.09
  4. Step 4: Simplify right side
    7,985.08x = 59,835,969.59
  5. Step 5: Solve for x
    x = 59,835,969.59/7,985.08
  6. Step 6: Final answer
    x = 7,493.47

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Double scale
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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.