Home / 5,429.70-8,144.55-2,656.80

Finding the Fourth Proportional to 5,429.70, 8,144.55 and 2,656.80

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Solution

The fourth proportional to 5,429.70, 8,144.55 and 2,656.80 is: 3,985.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,429.70 : 8,144.55 = 2,656.80 : x
  2. Step 2: Convert to fraction form
    5,429.70/8,144.55 = 2,656.80/x
  3. Step 3: Cross multiply
    5,429.70x = 8,144.55 × 2,656.80
  4. Step 4: Simplify right side
    5,429.70x = 21,638,440.44
  5. Step 5: Solve for x
    x = 21,638,440.44/5,429.70
  6. Step 6: Final answer
    x = 3,985.20

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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.