Home / 5,136.80-7,088.76-2,778.92

Finding the Fourth Proportional to 5,136.80, 7,088.76 and 2,778.92

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Solution

The fourth proportional to 5,136.80, 7,088.76 and 2,778.92 is: 3,834.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,136.80 : 7,088.76 = 2,778.92 : x
  2. Step 2: Convert to fraction form
    5,136.80/7,088.76 = 2,778.92/x
  3. Step 3: Cross multiply
    5,136.80x = 7,088.76 × 2,778.92
  4. Step 4: Simplify right side
    5,136.80x = 19,699,096.94
  5. Step 5: Solve for x
    x = 19,699,096.94/5,136.80
  6. Step 6: Final answer
    x = 3,834.90

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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.