Home / 13,787.73-20,690.10-6,390.81

Finding the Fourth Proportional to 13,787.73, 20,690.10 and 6,390.81

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Solution

The fourth proportional to 13,787.73, 20,690.10 and 6,390.81 is: 9,590.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,787.73 : 20,690.10 = 6,390.81 : x
  2. Step 2: Convert to fraction form
    13,787.73/20,690.10 = 6,390.81/x
  3. Step 3: Cross multiply
    13,787.73x = 20,690.10 × 6,390.81
  4. Step 4: Simplify right side
    13,787.73x = 132,226,497.98
  5. Step 5: Solve for x
    x = 132,226,497.98/13,787.73
  6. Step 6: Final answer
    x = 9,590.16

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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.