Home / 3,136.40-4,328.76-2,389.16

Finding the Fourth Proportional to 3,136.40, 4,328.76 and 2,389.16

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Solution

The fourth proportional to 3,136.40, 4,328.76 and 2,389.16 is: 3,297.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,136.40 : 4,328.76 = 2,389.16 : x
  2. Step 2: Convert to fraction form
    3,136.40/4,328.76 = 2,389.16/x
  3. Step 3: Cross multiply
    3,136.40x = 4,328.76 × 2,389.16
  4. Step 4: Simplify right side
    3,136.40x = 10,342,100.24
  5. Step 5: Solve for x
    x = 10,342,100.24/3,136.40
  6. Step 6: Final answer
    x = 3,297.44

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Half scale
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Double scale
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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.