Home / 5,128.60-7,692.90-4,847.80

Finding the Fourth Proportional to 5,128.60, 7,692.90 and 4,847.80

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Solution

The fourth proportional to 5,128.60, 7,692.90 and 4,847.80 is: 7,271.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.60 : 7,692.90 = 4,847.80 : x
  2. Step 2: Convert to fraction form
    5,128.60/7,692.90 = 4,847.80/x
  3. Step 3: Cross multiply
    5,128.60x = 7,692.90 × 4,847.80
  4. Step 4: Simplify right side
    5,128.60x = 37,293,640.62
  5. Step 5: Solve for x
    x = 37,293,640.62/5,128.60
  6. Step 6: Final answer
    x = 7,271.70

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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.