Home / 3,923.96-5,413-2,431.40

Finding the Fourth Proportional to 3,923.96, 5,413 and 2,431.40

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Solution

The fourth proportional to 3,923.96, 5,413 and 2,431.40 is: 3,354.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,923.96 : 5,413 = 2,431.40 : x
  2. Step 2: Convert to fraction form
    3,923.96/5,413 = 2,431.40/x
  3. Step 3: Cross multiply
    3,923.96x = 5,413 × 2,431.40
  4. Step 4: Simplify right side
    3,923.96x = 13,161,168.20
  5. Step 5: Solve for x
    x = 13,161,168.20/3,923.96
  6. Step 6: Final answer
    x = 3,354.05

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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.