Home / 5,136.68-7,088.59-2,778.80

Finding the Fourth Proportional to 5,136.68, 7,088.59 and 2,778.80

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Solution

The fourth proportional to 5,136.68, 7,088.59 and 2,778.80 is: 3,834.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,136.68 : 7,088.59 = 2,778.80 : x
  2. Step 2: Convert to fraction form
    5,136.68/7,088.59 = 2,778.80/x
  3. Step 3: Cross multiply
    5,136.68x = 7,088.59 × 2,778.80
  4. Step 4: Simplify right side
    5,136.68x = 19,697,731.50
  5. Step 5: Solve for x
    x = 19,697,731.50/5,136.68
  6. Step 6: Final answer
    x = 3,834.72

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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.