Home / 12,511.56-18,719.55-10,939.95

Finding the Fourth Proportional to 12,511.56, 18,719.55 and 10,939.95

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Solution

The fourth proportional to 12,511.56, 18,719.55 and 10,939.95 is: 16,368.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,511.56 : 18,719.55 = 10,939.95 : x
  2. Step 2: Convert to fraction form
    12,511.56/18,719.55 = 10,939.95/x
  3. Step 3: Cross multiply
    12,511.56x = 18,719.55 × 10,939.95
  4. Step 4: Simplify right side
    12,511.56x = 204,790,941.02
  5. Step 5: Solve for x
    x = 204,790,941.02/12,511.56
  6. Step 6: Final answer
    x = 16,368.14

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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.