Home / 12,690.38-19,030.33-4,791.56

Finding the Fourth Proportional to 12,690.38, 19,030.33 and 4,791.56

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Solution

The fourth proportional to 12,690.38, 19,030.33 and 4,791.56 is: 7,185.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.38 : 19,030.33 = 4,791.56 : x
  2. Step 2: Convert to fraction form
    12,690.38/19,030.33 = 4,791.56/x
  3. Step 3: Cross multiply
    12,690.38x = 19,030.33 × 4,791.56
  4. Step 4: Simplify right side
    12,690.38x = 91,184,851.90
  5. Step 5: Solve for x
    x = 91,184,851.90/12,690.38
  6. Step 6: Final answer
    x = 7,185.35

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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.