Home / 7,218.80-10,828.20-6,392.60

Finding the Fourth Proportional to 7,218.80, 10,828.20 and 6,392.60

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Solution

The fourth proportional to 7,218.80, 10,828.20 and 6,392.60 is: 9,588.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,218.80 : 10,828.20 = 6,392.60 : x
  2. Step 2: Convert to fraction form
    7,218.80/10,828.20 = 6,392.60/x
  3. Step 3: Cross multiply
    7,218.80x = 10,828.20 × 6,392.60
  4. Step 4: Simplify right side
    7,218.80x = 69,220,351.32
  5. Step 5: Solve for x
    x = 69,220,351.32/7,218.80
  6. Step 6: Final answer
    x = 9,588.90

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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.