Home / 5,128.36-7,076.93-2,890.69

Finding the Fourth Proportional to 5,128.36, 7,076.93 and 2,890.69

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Solution

The fourth proportional to 5,128.36, 7,076.93 and 2,890.69 is: 3,989.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.36 : 7,076.93 = 2,890.69 : x
  2. Step 2: Convert to fraction form
    5,128.36/7,076.93 = 2,890.69/x
  3. Step 3: Cross multiply
    5,128.36x = 7,076.93 × 2,890.69
  4. Step 4: Simplify right side
    5,128.36x = 20,457,200.32
  5. Step 5: Solve for x
    x = 20,457,200.32/5,128.36
  6. Step 6: Final answer
    x = 3,989.04

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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.