Home / 13,730.21-18,947.62-7,761.86

Finding the Fourth Proportional to 13,730.21, 18,947.62 and 7,761.86

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Solution

The fourth proportional to 13,730.21, 18,947.62 and 7,761.86 is: 10,711.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,730.21 : 18,947.62 = 7,761.86 : x
  2. Step 2: Convert to fraction form
    13,730.21/18,947.62 = 7,761.86/x
  3. Step 3: Cross multiply
    13,730.21x = 18,947.62 × 7,761.86
  4. Step 4: Simplify right side
    13,730.21x = 147,068,759.79
  5. Step 5: Solve for x
    x = 147,068,759.79/13,730.21
  6. Step 6: Final answer
    x = 10,711.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.