Home / 5,128.20-7,695.26-2,166.40

Finding the Fourth Proportional to 5,128.20, 7,695.26 and 2,166.40

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Solution

The fourth proportional to 5,128.20, 7,695.26 and 2,166.40 is: 3,250.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.20 : 7,695.26 = 2,166.40 : x
  2. Step 2: Convert to fraction form
    5,128.20/7,695.26 = 2,166.40/x
  3. Step 3: Cross multiply
    5,128.20x = 7,695.26 × 2,166.40
  4. Step 4: Simplify right side
    5,128.20x = 16,671,011.26
  5. Step 5: Solve for x
    x = 16,671,011.26/5,128.20
  6. Step 6: Final answer
    x = 3,250.85

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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.