Home / 13,114.77-19,689.32-7,787.69

Finding the Fourth Proportional to 13,114.77, 19,689.32 and 7,787.69

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Solution

The fourth proportional to 13,114.77, 19,689.32 and 7,787.69 is: 11,691.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,114.77 : 19,689.32 = 7,787.69 : x
  2. Step 2: Convert to fraction form
    13,114.77/19,689.32 = 7,787.69/x
  3. Step 3: Cross multiply
    13,114.77x = 19,689.32 × 7,787.69
  4. Step 4: Simplify right side
    13,114.77x = 153,334,183.09
  5. Step 5: Solve for x
    x = 153,334,183.09/13,114.77
  6. Step 6: Final answer
    x = 11,691.72

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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.