Home / 13,120.56-19,680.84-3,886.56

Finding the Fourth Proportional to 13,120.56, 19,680.84 and 3,886.56

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Solution

The fourth proportional to 13,120.56, 19,680.84 and 3,886.56 is: 5,829.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.56 : 19,680.84 = 3,886.56 : x
  2. Step 2: Convert to fraction form
    13,120.56/19,680.84 = 3,886.56/x
  3. Step 3: Cross multiply
    13,120.56x = 19,680.84 × 3,886.56
  4. Step 4: Simplify right side
    13,120.56x = 76,490,765.51
  5. Step 5: Solve for x
    x = 76,490,765.51/13,120.56
  6. Step 6: Final answer
    x = 5,829.84

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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.