Home / 11,985.76-17,976.96-6,142.40

Finding the Fourth Proportional to 11,985.76, 17,976.96 and 6,142.40

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Solution

The fourth proportional to 11,985.76, 17,976.96 and 6,142.40 is: 9,212.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,985.76 : 17,976.96 = 6,142.40 : x
  2. Step 2: Convert to fraction form
    11,985.76/17,976.96 = 6,142.40/x
  3. Step 3: Cross multiply
    11,985.76x = 17,976.96 × 6,142.40
  4. Step 4: Simplify right side
    11,985.76x = 110,421,679.10
  5. Step 5: Solve for x
    x = 110,421,679.10/11,985.76
  6. Step 6: Final answer
    x = 9,212.74

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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.