Home / 12,119.60-18,147-6,918.32

Finding the Fourth Proportional to 12,119.60, 18,147 and 6,918.32

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Solution

The fourth proportional to 12,119.60, 18,147 and 6,918.32 is: 10,358.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,119.60 : 18,147 = 6,918.32 : x
  2. Step 2: Convert to fraction form
    12,119.60/18,147 = 6,918.32/x
  3. Step 3: Cross multiply
    12,119.60x = 18,147 × 6,918.32
  4. Step 4: Simplify right side
    12,119.60x = 125,546,753.04
  5. Step 5: Solve for x
    x = 125,546,753.04/12,119.60
  6. Step 6: Final answer
    x = 10,358.98

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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.