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Finding the Fourth Proportional to 11,990.88, 17,986.32 and 5,070.24

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Solution

The fourth proportional to 11,990.88, 17,986.32 and 5,070.24 is: 7,605.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,990.88 : 17,986.32 = 5,070.24 : x
  2. Step 2: Convert to fraction form
    11,990.88/17,986.32 = 5,070.24/x
  3. Step 3: Cross multiply
    11,990.88x = 17,986.32 × 5,070.24
  4. Step 4: Simplify right side
    11,990.88x = 91,194,959.12
  5. Step 5: Solve for x
    x = 91,194,959.12/11,990.88
  6. Step 6: Final answer
    x = 7,605.36

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Similar ratio
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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.