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Finding the Fourth Proportional to 7,149.78, 10,724.28 and 1,955.28

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Solution

The fourth proportional to 7,149.78, 10,724.28 and 1,955.28 is: 2,932.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,149.78 : 10,724.28 = 1,955.28 : x
  2. Step 2: Convert to fraction form
    7,149.78/10,724.28 = 1,955.28/x
  3. Step 3: Cross multiply
    7,149.78x = 10,724.28 × 1,955.28
  4. Step 4: Simplify right side
    7,149.78x = 20,968,970.20
  5. Step 5: Solve for x
    x = 20,968,970.20/7,149.78
  6. Step 6: Final answer
    x = 2,932.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.