Home / 3,139.70-4,328.15-2,392.35

Finding the Fourth Proportional to 3,139.70, 4,328.15 and 2,392.35

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Solution

The fourth proportional to 3,139.70, 4,328.15 and 2,392.35 is: 3,297.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.70 : 4,328.15 = 2,392.35 : x
  2. Step 2: Convert to fraction form
    3,139.70/4,328.15 = 2,392.35/x
  3. Step 3: Cross multiply
    3,139.70x = 4,328.15 × 2,392.35
  4. Step 4: Simplify right side
    3,139.70x = 10,354,437.69
  5. Step 5: Solve for x
    x = 10,354,437.69/3,139.70
  6. Step 6: Final answer
    x = 3,297.91

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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.