Home / 5,403.40-8,105.10-2,115.40

Finding the Fourth Proportional to 5,403.40, 8,105.10 and 2,115.40

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Solution

The fourth proportional to 5,403.40, 8,105.10 and 2,115.40 is: 3,173.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,403.40 : 8,105.10 = 2,115.40 : x
  2. Step 2: Convert to fraction form
    5,403.40/8,105.10 = 2,115.40/x
  3. Step 3: Cross multiply
    5,403.40x = 8,105.10 × 2,115.40
  4. Step 4: Simplify right side
    5,403.40x = 17,145,528.54
  5. Step 5: Solve for x
    x = 17,145,528.54/5,403.40
  6. Step 6: Final answer
    x = 3,173.10

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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.