Home / 7,478.82-10,320.70-4,121.54

Finding the Fourth Proportional to 7,478.82, 10,320.70 and 4,121.54

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Solution

The fourth proportional to 7,478.82, 10,320.70 and 4,121.54 is: 5,687.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.82 : 10,320.70 = 4,121.54 : x
  2. Step 2: Convert to fraction form
    7,478.82/10,320.70 = 4,121.54/x
  3. Step 3: Cross multiply
    7,478.82x = 10,320.70 × 4,121.54
  4. Step 4: Simplify right side
    7,478.82x = 42,537,177.88
  5. Step 5: Solve for x
    x = 42,537,177.88/7,478.82
  6. Step 6: Final answer
    x = 5,687.69

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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.