Home / 12,621.36-18,930.60-3,386.64

Finding the Fourth Proportional to 12,621.36, 18,930.60 and 3,386.64

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Solution

The fourth proportional to 12,621.36, 18,930.60 and 3,386.64 is: 5,079.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,621.36 : 18,930.60 = 3,386.64 : x
  2. Step 2: Convert to fraction form
    12,621.36/18,930.60 = 3,386.64/x
  3. Step 3: Cross multiply
    12,621.36x = 18,930.60 × 3,386.64
  4. Step 4: Simplify right side
    12,621.36x = 64,111,127.18
  5. Step 5: Solve for x
    x = 64,111,127.18/12,621.36
  6. Step 6: Final answer
    x = 5,079.57

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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.