Home / 4,140.90-6,211.78-1,328.74

Finding the Fourth Proportional to 4,140.90, 6,211.78 and 1,328.74

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Solution

The fourth proportional to 4,140.90, 6,211.78 and 1,328.74 is: 1,993.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,140.90 : 6,211.78 = 1,328.74 : x
  2. Step 2: Convert to fraction form
    4,140.90/6,211.78 = 1,328.74/x
  3. Step 3: Cross multiply
    4,140.90x = 6,211.78 × 1,328.74
  4. Step 4: Simplify right side
    4,140.90x = 8,253,821.71
  5. Step 5: Solve for x
    x = 8,253,821.71/4,140.90
  6. Step 6: Final answer
    x = 1,993.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.