Home / 5,136.16-7,087.90-2,778.30

Finding the Fourth Proportional to 5,136.16, 7,087.90 and 2,778.30

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Solution

The fourth proportional to 5,136.16, 7,087.90 and 2,778.30 is: 3,834.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,136.16 : 7,087.90 = 2,778.30 : x
  2. Step 2: Convert to fraction form
    5,136.16/7,087.90 = 2,778.30/x
  3. Step 3: Cross multiply
    5,136.16x = 7,087.90 × 2,778.30
  4. Step 4: Simplify right side
    5,136.16x = 19,692,312.57
  5. Step 5: Solve for x
    x = 19,692,312.57/5,136.16
  6. Step 6: Final answer
    x = 3,834.05

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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.