Home / 7,985.17-11,976.81-2,142.19

Finding the Fourth Proportional to 7,985.17, 11,976.81 and 2,142.19

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Solution

The fourth proportional to 7,985.17, 11,976.81 and 2,142.19 is: 3,213.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985.17 : 11,976.81 = 2,142.19 : x
  2. Step 2: Convert to fraction form
    7,985.17/11,976.81 = 2,142.19/x
  3. Step 3: Cross multiply
    7,985.17x = 11,976.81 × 2,142.19
  4. Step 4: Simplify right side
    7,985.17x = 25,656,602.61
  5. Step 5: Solve for x
    x = 25,656,602.61/7,985.17
  6. Step 6: Final answer
    x = 3,213.03

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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.