Home / 12,613.12-18,928.80-4,821.96

Finding the Fourth Proportional to 12,613.12, 18,928.80 and 4,821.96

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Solution

The fourth proportional to 12,613.12, 18,928.80 and 4,821.96 is: 7,236.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,613.12 : 18,928.80 = 4,821.96 : x
  2. Step 2: Convert to fraction form
    12,613.12/18,928.80 = 4,821.96/x
  3. Step 3: Cross multiply
    12,613.12x = 18,928.80 × 4,821.96
  4. Step 4: Simplify right side
    12,613.12x = 91,273,916.45
  5. Step 5: Solve for x
    x = 91,273,916.45/12,613.12
  6. Step 6: Final answer
    x = 7,236.43

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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.