Home / 13,608.06-18,780.18-7,639.34

Finding the Fourth Proportional to 13,608.06, 18,780.18 and 7,639.34

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Solution

The fourth proportional to 13,608.06, 18,780.18 and 7,639.34 is: 10,542.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.06 : 18,780.18 = 7,639.34 : x
  2. Step 2: Convert to fraction form
    13,608.06/18,780.18 = 7,639.34/x
  3. Step 3: Cross multiply
    13,608.06x = 18,780.18 × 7,639.34
  4. Step 4: Simplify right side
    13,608.06x = 143,468,180.28
  5. Step 5: Solve for x
    x = 143,468,180.28/13,608.06
  6. Step 6: Final answer
    x = 10,542.88

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1.5x scale

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.