Home / 13,738.48-18,960.28-7,771.20

Finding the Fourth Proportional to 13,738.48, 18,960.28 and 7,771.20

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Solution

The fourth proportional to 13,738.48, 18,960.28 and 7,771.20 is: 10,724.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,738.48 : 18,960.28 = 7,771.20 : x
  2. Step 2: Convert to fraction form
    13,738.48/18,960.28 = 7,771.20/x
  3. Step 3: Cross multiply
    13,738.48x = 18,960.28 × 7,771.20
  4. Step 4: Simplify right side
    13,738.48x = 147,344,127.94
  5. Step 5: Solve for x
    x = 147,344,127.94/13,738.48
  6. Step 6: Final answer
    x = 10,724.92

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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.