Home / 5,131.80-7,697.52-1,621.80

Finding the Fourth Proportional to 5,131.80, 7,697.52 and 1,621.80

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Solution

The fourth proportional to 5,131.80, 7,697.52 and 1,621.80 is: 2,432.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,131.80 : 7,697.52 = 1,621.80 : x
  2. Step 2: Convert to fraction form
    5,131.80/7,697.52 = 1,621.80/x
  3. Step 3: Cross multiply
    5,131.80x = 7,697.52 × 1,621.80
  4. Step 4: Simplify right side
    5,131.80x = 12,483,837.94
  5. Step 5: Solve for x
    x = 12,483,837.94/5,131.80
  6. Step 6: Final answer
    x = 2,432.64

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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.