Home / 7,121.32-9,827.42-4,137.72

Finding the Fourth Proportional to 7,121.32, 9,827.42 and 4,137.72

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Solution

The fourth proportional to 7,121.32, 9,827.42 and 4,137.72 is: 5,710.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.32 : 9,827.42 = 4,137.72 : x
  2. Step 2: Convert to fraction form
    7,121.32/9,827.42 = 4,137.72/x
  3. Step 3: Cross multiply
    7,121.32x = 9,827.42 × 4,137.72
  4. Step 4: Simplify right side
    7,121.32x = 40,663,112.28
  5. Step 5: Solve for x
    x = 40,663,112.28/7,121.32
  6. Step 6: Final answer
    x = 5,710.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.