Home / 7,629.20-11,443.80-5,539.40

Finding the Fourth Proportional to 7,629.20, 11,443.80 and 5,539.40

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Solution

The fourth proportional to 7,629.20, 11,443.80 and 5,539.40 is: 8,309.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,629.20 : 11,443.80 = 5,539.40 : x
  2. Step 2: Convert to fraction form
    7,629.20/11,443.80 = 5,539.40/x
  3. Step 3: Cross multiply
    7,629.20x = 11,443.80 × 5,539.40
  4. Step 4: Simplify right side
    7,629.20x = 63,391,785.72
  5. Step 5: Solve for x
    x = 63,391,785.72/7,629.20
  6. Step 6: Final answer
    x = 8,309.10

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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.