Home / 5,128.16-7,076.96-3,005.22

Finding the Fourth Proportional to 5,128.16, 7,076.96 and 3,005.22

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Solution

The fourth proportional to 5,128.16, 7,076.96 and 3,005.22 is: 4,147.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.16 : 7,076.96 = 3,005.22 : x
  2. Step 2: Convert to fraction form
    5,128.16/7,076.96 = 3,005.22/x
  3. Step 3: Cross multiply
    5,128.16x = 7,076.96 × 3,005.22
  4. Step 4: Simplify right side
    5,128.16x = 21,267,806.71
  5. Step 5: Solve for x
    x = 21,267,806.71/5,128.16
  6. Step 6: Final answer
    x = 4,147.26

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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.