Home / 7,239.74-9,990.68-4,255.66

Finding the Fourth Proportional to 7,239.74, 9,990.68 and 4,255.66

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Solution

The fourth proportional to 7,239.74, 9,990.68 and 4,255.66 is: 5,872.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.74 : 9,990.68 = 4,255.66 : x
  2. Step 2: Convert to fraction form
    7,239.74/9,990.68 = 4,255.66/x
  3. Step 3: Cross multiply
    7,239.74x = 9,990.68 × 4,255.66
  4. Step 4: Simplify right side
    7,239.74x = 42,516,890.99
  5. Step 5: Solve for x
    x = 42,516,890.99/7,239.74
  6. Step 6: Final answer
    x = 5,872.71

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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.