Home / 3,921.30-5,421.60-3,702.60

Finding the Fourth Proportional to 3,921.30, 5,421.60 and 3,702.60

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Solution

The fourth proportional to 3,921.30, 5,421.60 and 3,702.60 is: 5,119.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.30 : 5,421.60 = 3,702.60 : x
  2. Step 2: Convert to fraction form
    3,921.30/5,421.60 = 3,702.60/x
  3. Step 3: Cross multiply
    3,921.30x = 5,421.60 × 3,702.60
  4. Step 4: Simplify right side
    3,921.30x = 20,074,016.16
  5. Step 5: Solve for x
    x = 20,074,016.16/3,921.30
  6. Step 6: Final answer
    x = 5,119.22

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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.