Home / 7,121.30-9,827.20-3,934.66

Finding the Fourth Proportional to 7,121.30, 9,827.20 and 3,934.66

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Solution

The fourth proportional to 7,121.30, 9,827.20 and 3,934.66 is: 5,429.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.30 : 9,827.20 = 3,934.66 : x
  2. Step 2: Convert to fraction form
    7,121.30/9,827.20 = 3,934.66/x
  3. Step 3: Cross multiply
    7,121.30x = 9,827.20 × 3,934.66
  4. Step 4: Simplify right side
    7,121.30x = 38,666,690.75
  5. Step 5: Solve for x
    x = 38,666,690.75/7,121.30
  6. Step 6: Final answer
    x = 5,429.72

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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.