Home / 13,691.44-18,894.36-7,722.55

Finding the Fourth Proportional to 13,691.44, 18,894.36 and 7,722.55

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Solution

The fourth proportional to 13,691.44, 18,894.36 and 7,722.55 is: 10,657.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691.44 : 18,894.36 = 7,722.55 : x
  2. Step 2: Convert to fraction form
    13,691.44/18,894.36 = 7,722.55/x
  3. Step 3: Cross multiply
    13,691.44x = 18,894.36 × 7,722.55
  4. Step 4: Simplify right side
    13,691.44x = 145,912,639.82
  5. Step 5: Solve for x
    x = 145,912,639.82/13,691.44
  6. Step 6: Final answer
    x = 10,657.22

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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.