Home / 3,157.90-4,358.95-2,166.05

Finding the Fourth Proportional to 3,157.90, 4,358.95 and 2,166.05

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Solution

The fourth proportional to 3,157.90, 4,358.95 and 2,166.05 is: 2,989.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,157.90 : 4,358.95 = 2,166.05 : x
  2. Step 2: Convert to fraction form
    3,157.90/4,358.95 = 2,166.05/x
  3. Step 3: Cross multiply
    3,157.90x = 4,358.95 × 2,166.05
  4. Step 4: Simplify right side
    3,157.90x = 9,441,709.13
  5. Step 5: Solve for x
    x = 9,441,709.13/3,157.90
  6. Step 6: Final answer
    x = 2,989.87

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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.