Home / 12,620.64-18,930.88-3,855.52

Finding the Fourth Proportional to 12,620.64, 18,930.88 and 3,855.52

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Solution

The fourth proportional to 12,620.64, 18,930.88 and 3,855.52 is: 5,783.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.64 : 18,930.88 = 3,855.52 : x
  2. Step 2: Convert to fraction form
    12,620.64/18,930.88 = 3,855.52/x
  3. Step 3: Cross multiply
    12,620.64x = 18,930.88 × 3,855.52
  4. Step 4: Simplify right side
    12,620.64x = 72,988,386.46
  5. Step 5: Solve for x
    x = 72,988,386.46/12,620.64
  6. Step 6: Final answer
    x = 5,783.26

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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.