Home / 7,687.86-11,513.31-4,390.95

Finding the Fourth Proportional to 7,687.86, 11,513.31 and 4,390.95

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Solution

The fourth proportional to 7,687.86, 11,513.31 and 4,390.95 is: 6,575.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,687.86 : 11,513.31 = 4,390.95 : x
  2. Step 2: Convert to fraction form
    7,687.86/11,513.31 = 4,390.95/x
  3. Step 3: Cross multiply
    7,687.86x = 11,513.31 × 4,390.95
  4. Step 4: Simplify right side
    7,687.86x = 50,554,368.54
  5. Step 5: Solve for x
    x = 50,554,368.54/7,687.86
  6. Step 6: Final answer
    x = 6,575.87

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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.