Home / 13,118.20-19,686.90-8,734.20

Finding the Fourth Proportional to 13,118.20, 19,686.90 and 8,734.20

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Solution

The fourth proportional to 13,118.20, 19,686.90 and 8,734.20 is: 13,107.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.20 : 19,686.90 = 8,734.20 : x
  2. Step 2: Convert to fraction form
    13,118.20/19,686.90 = 8,734.20/x
  3. Step 3: Cross multiply
    13,118.20x = 19,686.90 × 8,734.20
  4. Step 4: Simplify right side
    13,118.20x = 171,949,321.98
  5. Step 5: Solve for x
    x = 171,949,321.98/13,118.20
  6. Step 6: Final answer
    x = 13,107.69

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1.5x scale

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.