Home / 7,429.20-11,143.80-5,679.60

Finding the Fourth Proportional to 7,429.20, 11,143.80 and 5,679.60

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Solution

The fourth proportional to 7,429.20, 11,143.80 and 5,679.60 is: 8,519.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,429.20 : 11,143.80 = 5,679.60 : x
  2. Step 2: Convert to fraction form
    7,429.20/11,143.80 = 5,679.60/x
  3. Step 3: Cross multiply
    7,429.20x = 11,143.80 × 5,679.60
  4. Step 4: Simplify right side
    7,429.20x = 63,292,326.48
  5. Step 5: Solve for x
    x = 63,292,326.48/7,429.20
  6. Step 6: Final answer
    x = 8,519.40

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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.