Home / 3,990.29-5,509.82-2,574.68

Finding the Fourth Proportional to 3,990.29, 5,509.82 and 2,574.68

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Solution

The fourth proportional to 3,990.29, 5,509.82 and 2,574.68 is: 3,555.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.29 : 5,509.82 = 2,574.68 : x
  2. Step 2: Convert to fraction form
    3,990.29/5,509.82 = 2,574.68/x
  3. Step 3: Cross multiply
    3,990.29x = 5,509.82 × 2,574.68
  4. Step 4: Simplify right side
    3,990.29x = 14,186,002.25
  5. Step 5: Solve for x
    x = 14,186,002.25/3,990.29
  6. Step 6: Final answer
    x = 3,555.14

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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.