Home / 5,478.99-7,561.31-3,120.68

Finding the Fourth Proportional to 5,478.99, 7,561.31 and 3,120.68

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Solution

The fourth proportional to 5,478.99, 7,561.31 and 3,120.68 is: 4,306.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.99 : 7,561.31 = 3,120.68 : x
  2. Step 2: Convert to fraction form
    5,478.99/7,561.31 = 3,120.68/x
  3. Step 3: Cross multiply
    5,478.99x = 7,561.31 × 3,120.68
  4. Step 4: Simplify right side
    5,478.99x = 23,596,428.89
  5. Step 5: Solve for x
    x = 23,596,428.89/5,478.99
  6. Step 6: Final answer
    x = 4,306.71

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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.