Home / 5,128.44-7,077.30-2,890.30

Finding the Fourth Proportional to 5,128.44, 7,077.30 and 2,890.30

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Solution

The fourth proportional to 5,128.44, 7,077.30 and 2,890.30 is: 3,988.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.44 : 7,077.30 = 2,890.30 : x
  2. Step 2: Convert to fraction form
    5,128.44/7,077.30 = 2,890.30/x
  3. Step 3: Cross multiply
    5,128.44x = 7,077.30 × 2,890.30
  4. Step 4: Simplify right side
    5,128.44x = 20,455,520.19
  5. Step 5: Solve for x
    x = 20,455,520.19/5,128.44
  6. Step 6: Final answer
    x = 3,988.64

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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.