Home / 5,420.98-8,136.33-3,778.71

Finding the Fourth Proportional to 5,420.98, 8,136.33 and 3,778.71

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Solution

The fourth proportional to 5,420.98, 8,136.33 and 3,778.71 is: 5,671.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.98 : 8,136.33 = 3,778.71 : x
  2. Step 2: Convert to fraction form
    5,420.98/8,136.33 = 3,778.71/x
  3. Step 3: Cross multiply
    5,420.98x = 8,136.33 × 3,778.71
  4. Step 4: Simplify right side
    5,420.98x = 30,744,831.53
  5. Step 5: Solve for x
    x = 30,744,831.53/5,420.98
  6. Step 6: Final answer
    x = 5,671.45

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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.