Home / 3,136.60-4,328.62-1,720.20

Finding the Fourth Proportional to 3,136.60, 4,328.62 and 1,720.20

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Solution

The fourth proportional to 3,136.60, 4,328.62 and 1,720.20 is: 2,373.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,136.60 : 4,328.62 = 1,720.20 : x
  2. Step 2: Convert to fraction form
    3,136.60/4,328.62 = 1,720.20/x
  3. Step 3: Cross multiply
    3,136.60x = 4,328.62 × 1,720.20
  4. Step 4: Simplify right side
    3,136.60x = 7,446,092.12
  5. Step 5: Solve for x
    x = 7,446,092.12/3,136.60
  6. Step 6: Final answer
    x = 2,373.94

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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.