Home / 5,321.13-7,980.78-1,424.62

Finding the Fourth Proportional to 5,321.13, 7,980.78 and 1,424.62

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Solution

The fourth proportional to 5,321.13, 7,980.78 and 1,424.62 is: 2,136.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,321.13 : 7,980.78 = 1,424.62 : x
  2. Step 2: Convert to fraction form
    5,321.13/7,980.78 = 1,424.62/x
  3. Step 3: Cross multiply
    5,321.13x = 7,980.78 × 1,424.62
  4. Step 4: Simplify right side
    5,321.13x = 11,369,578.80
  5. Step 5: Solve for x
    x = 11,369,578.80/5,321.13
  6. Step 6: Final answer
    x = 2,136.69

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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.