Home / 13,742.18-18,961.04-7,772.56

Finding the Fourth Proportional to 13,742.18, 18,961.04 and 7,772.56

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Solution

The fourth proportional to 13,742.18, 18,961.04 and 7,772.56 is: 10,724.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,742.18 : 18,961.04 = 7,772.56 : x
  2. Step 2: Convert to fraction form
    13,742.18/18,961.04 = 7,772.56/x
  3. Step 3: Cross multiply
    13,742.18x = 18,961.04 × 7,772.56
  4. Step 4: Simplify right side
    13,742.18x = 147,375,821.06
  5. Step 5: Solve for x
    x = 147,375,821.06/13,742.18
  6. Step 6: Final answer
    x = 10,724.34

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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.