Home / 3,989.72-5,509.28-2,500.20

Finding the Fourth Proportional to 3,989.72, 5,509.28 and 2,500.20

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Solution

The fourth proportional to 3,989.72, 5,509.28 and 2,500.20 is: 3,452.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.72 : 5,509.28 = 2,500.20 : x
  2. Step 2: Convert to fraction form
    3,989.72/5,509.28 = 2,500.20/x
  3. Step 3: Cross multiply
    3,989.72x = 5,509.28 × 2,500.20
  4. Step 4: Simplify right side
    3,989.72x = 13,774,308.11
  5. Step 5: Solve for x
    x = 13,774,308.11/3,989.72
  6. Step 6: Final answer
    x = 3,452.45

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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.