Home / 5,431.74-8,142.62-1,919.18

Finding the Fourth Proportional to 5,431.74, 8,142.62 and 1,919.18

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Solution

The fourth proportional to 5,431.74, 8,142.62 and 1,919.18 is: 2,877.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.74 : 8,142.62 = 1,919.18 : x
  2. Step 2: Convert to fraction form
    5,431.74/8,142.62 = 1,919.18/x
  3. Step 3: Cross multiply
    5,431.74x = 8,142.62 × 1,919.18
  4. Step 4: Simplify right side
    5,431.74x = 15,627,103.14
  5. Step 5: Solve for x
    x = 15,627,103.14/5,431.74
  6. Step 6: Final answer
    x = 2,877.00

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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.