Home / 7,620.40-11,422.79-5,155.46

Finding the Fourth Proportional to 7,620.40, 11,422.79 and 5,155.46

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Solution

The fourth proportional to 7,620.40, 11,422.79 and 5,155.46 is: 7,727.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,620.40 : 11,422.79 = 5,155.46 : x
  2. Step 2: Convert to fraction form
    7,620.40/11,422.79 = 5,155.46/x
  3. Step 3: Cross multiply
    7,620.40x = 11,422.79 × 5,155.46
  4. Step 4: Simplify right side
    7,620.40x = 58,889,711.16
  5. Step 5: Solve for x
    x = 58,889,711.16/7,620.40
  6. Step 6: Final answer
    x = 7,727.91

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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.