Home / 12,647.27-18,980.39-4,757.55

Finding the Fourth Proportional to 12,647.27, 18,980.39 and 4,757.55

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Solution

The fourth proportional to 12,647.27, 18,980.39 and 4,757.55 is: 7,139.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,647.27 : 18,980.39 = 4,757.55 : x
  2. Step 2: Convert to fraction form
    12,647.27/18,980.39 = 4,757.55/x
  3. Step 3: Cross multiply
    12,647.27x = 18,980.39 × 4,757.55
  4. Step 4: Simplify right side
    12,647.27x = 90,300,154.44
  5. Step 5: Solve for x
    x = 90,300,154.44/12,647.27
  6. Step 6: Final answer
    x = 7,139.89

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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.