Home / 13,728.17-18,943.84-7,760.40

Finding the Fourth Proportional to 13,728.17, 18,943.84 and 7,760.40

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Solution

The fourth proportional to 13,728.17, 18,943.84 and 7,760.40 is: 10,708.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.17 : 18,943.84 = 7,760.40 : x
  2. Step 2: Convert to fraction form
    13,728.17/18,943.84 = 7,760.40/x
  3. Step 3: Cross multiply
    13,728.17x = 18,943.84 × 7,760.40
  4. Step 4: Simplify right side
    13,728.17x = 147,011,775.94
  5. Step 5: Solve for x
    x = 147,011,775.94/13,728.17
  6. Step 6: Final answer
    x = 10,708.77

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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.