Home / 5,086.78-7,630.16-1,389.38

Finding the Fourth Proportional to 5,086.78, 7,630.16 and 1,389.38

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Solution

The fourth proportional to 5,086.78, 7,630.16 and 1,389.38 is: 2,084.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,086.78 : 7,630.16 = 1,389.38 : x
  2. Step 2: Convert to fraction form
    5,086.78/7,630.16 = 1,389.38/x
  3. Step 3: Cross multiply
    5,086.78x = 7,630.16 × 1,389.38
  4. Step 4: Simplify right side
    5,086.78x = 10,601,191.70
  5. Step 5: Solve for x
    x = 10,601,191.70/5,086.78
  6. Step 6: Final answer
    x = 2,084.07

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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.