Home / 5,431.10-8,146.65-2,142.50

Finding the Fourth Proportional to 5,431.10, 8,146.65 and 2,142.50

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Solution

The fourth proportional to 5,431.10, 8,146.65 and 2,142.50 is: 3,213.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.10 : 8,146.65 = 2,142.50 : x
  2. Step 2: Convert to fraction form
    5,431.10/8,146.65 = 2,142.50/x
  3. Step 3: Cross multiply
    5,431.10x = 8,146.65 × 2,142.50
  4. Step 4: Simplify right side
    5,431.10x = 17,454,197.63
  5. Step 5: Solve for x
    x = 17,454,197.63/5,431.10
  6. Step 6: Final answer
    x = 3,213.75

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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.