Home / 13,120.32-19,686.28-6,878.84

Finding the Fourth Proportional to 13,120.32, 19,686.28 and 6,878.84

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Solution

The fourth proportional to 13,120.32, 19,686.28 and 6,878.84 is: 10,321.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.32 : 19,686.28 = 6,878.84 : x
  2. Step 2: Convert to fraction form
    13,120.32/19,686.28 = 6,878.84/x
  3. Step 3: Cross multiply
    13,120.32x = 19,686.28 × 6,878.84
  4. Step 4: Simplify right side
    13,120.32x = 135,418,770.32
  5. Step 5: Solve for x
    x = 135,418,770.32/13,120.32
  6. Step 6: Final answer
    x = 10,321.30

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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.