Home / 12,309.19-18,461.96-3,989.93

Finding the Fourth Proportional to 12,309.19, 18,461.96 and 3,989.93

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Solution

The fourth proportional to 12,309.19, 18,461.96 and 3,989.93 is: 5,984.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,309.19 : 18,461.96 = 3,989.93 : x
  2. Step 2: Convert to fraction form
    12,309.19/18,461.96 = 3,989.93/x
  3. Step 3: Cross multiply
    12,309.19x = 18,461.96 × 3,989.93
  4. Step 4: Simplify right side
    12,309.19x = 73,661,928.06
  5. Step 5: Solve for x
    x = 73,661,928.06/12,309.19
  6. Step 6: Final answer
    x = 5,984.30

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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.