Home / 5,128.67-7,077.65-3,005.72

Finding the Fourth Proportional to 5,128.67, 7,077.65 and 3,005.72

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Solution

The fourth proportional to 5,128.67, 7,077.65 and 3,005.72 is: 4,147.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.67 : 7,077.65 = 3,005.72 : x
  2. Step 2: Convert to fraction form
    5,128.67/7,077.65 = 3,005.72/x
  3. Step 3: Cross multiply
    5,128.67x = 7,077.65 × 3,005.72
  4. Step 4: Simplify right side
    5,128.67x = 21,273,419.13
  5. Step 5: Solve for x
    x = 21,273,419.13/5,128.67
  6. Step 6: Final answer
    x = 4,147.94

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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.