Home / 7,121.13-9,827.05-4,138.64

Finding the Fourth Proportional to 7,121.13, 9,827.05 and 4,138.64

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Solution

The fourth proportional to 7,121.13, 9,827.05 and 4,138.64 is: 5,711.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.13 : 9,827.05 = 4,138.64 : x
  2. Step 2: Convert to fraction form
    7,121.13/9,827.05 = 4,138.64/x
  3. Step 3: Cross multiply
    7,121.13x = 9,827.05 × 4,138.64
  4. Step 4: Simplify right side
    7,121.13x = 40,670,622.21
  5. Step 5: Solve for x
    x = 40,670,622.21/7,121.13
  6. Step 6: Final answer
    x = 5,711.26

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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.