Home / 7,621.12-11,431.74-2,689.63

Finding the Fourth Proportional to 7,621.12, 11,431.74 and 2,689.63

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Solution

The fourth proportional to 7,621.12, 11,431.74 and 2,689.63 is: 4,034.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,621.12 : 11,431.74 = 2,689.63 : x
  2. Step 2: Convert to fraction form
    7,621.12/11,431.74 = 2,689.63/x
  3. Step 3: Cross multiply
    7,621.12x = 11,431.74 × 2,689.63
  4. Step 4: Simplify right side
    7,621.12x = 30,747,150.86
  5. Step 5: Solve for x
    x = 30,747,150.86/7,621.12
  6. Step 6: Final answer
    x = 4,034.47

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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.