Home / 12,690.19-19,039.79-5,669.56

Finding the Fourth Proportional to 12,690.19, 19,039.79 and 5,669.56

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Solution

The fourth proportional to 12,690.19, 19,039.79 and 5,669.56 is: 8,506.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.19 : 19,039.79 = 5,669.56 : x
  2. Step 2: Convert to fraction form
    12,690.19/19,039.79 = 5,669.56/x
  3. Step 3: Cross multiply
    12,690.19x = 19,039.79 × 5,669.56
  4. Step 4: Simplify right side
    12,690.19x = 107,947,231.79
  5. Step 5: Solve for x
    x = 107,947,231.79/12,690.19
  6. Step 6: Final answer
    x = 8,506.35

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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.