Home / 5,420.28-7,485.30-4,629.72

Finding the Fourth Proportional to 5,420.28, 7,485.30 and 4,629.72

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Solution

The fourth proportional to 5,420.28, 7,485.30 and 4,629.72 is: 6,393.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.28 : 7,485.30 = 4,629.72 : x
  2. Step 2: Convert to fraction form
    5,420.28/7,485.30 = 4,629.72/x
  3. Step 3: Cross multiply
    5,420.28x = 7,485.30 × 4,629.72
  4. Step 4: Simplify right side
    5,420.28x = 34,654,843.12
  5. Step 5: Solve for x
    x = 34,654,843.12/5,420.28
  6. Step 6: Final answer
    x = 6,393.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.