Home / 5,128.36-7,691.85-1,430.27

Finding the Fourth Proportional to 5,128.36, 7,691.85 and 1,430.27

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Solution

The fourth proportional to 5,128.36, 7,691.85 and 1,430.27 is: 2,145.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.36 : 7,691.85 = 1,430.27 : x
  2. Step 2: Convert to fraction form
    5,128.36/7,691.85 = 1,430.27/x
  3. Step 3: Cross multiply
    5,128.36x = 7,691.85 × 1,430.27
  4. Step 4: Simplify right side
    5,128.36x = 11,001,447.57
  5. Step 5: Solve for x
    x = 11,001,447.57/5,128.36
  6. Step 6: Final answer
    x = 2,145.22

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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.