Home / 5,389.80-8,084.70-3,431.40

Finding the Fourth Proportional to 5,389.80, 8,084.70 and 3,431.40

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Solution

The fourth proportional to 5,389.80, 8,084.70 and 3,431.40 is: 5,147.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,389.80 : 8,084.70 = 3,431.40 : x
  2. Step 2: Convert to fraction form
    5,389.80/8,084.70 = 3,431.40/x
  3. Step 3: Cross multiply
    5,389.80x = 8,084.70 × 3,431.40
  4. Step 4: Simplify right side
    5,389.80x = 27,741,839.58
  5. Step 5: Solve for x
    x = 27,741,839.58/5,389.80
  6. Step 6: Final answer
    x = 5,147.10

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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.