Home / 12,288.38-18,428.36-4,890.82

Finding the Fourth Proportional to 12,288.38, 18,428.36 and 4,890.82

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Solution

The fourth proportional to 12,288.38, 18,428.36 and 4,890.82 is: 7,334.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,288.38 : 18,428.36 = 4,890.82 : x
  2. Step 2: Convert to fraction form
    12,288.38/18,428.36 = 4,890.82/x
  3. Step 3: Cross multiply
    12,288.38x = 18,428.36 × 4,890.82
  4. Step 4: Simplify right side
    12,288.38x = 90,129,791.66
  5. Step 5: Solve for x
    x = 90,129,791.66/12,288.38
  6. Step 6: Final answer
    x = 7,334.55

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1.5x scale

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.