Home / 5,128.50-7,691.96-1,430.34

Finding the Fourth Proportional to 5,128.50, 7,691.96 and 1,430.34

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Solution

The fourth proportional to 5,128.50, 7,691.96 and 1,430.34 is: 2,145.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.50 : 7,691.96 = 1,430.34 : x
  2. Step 2: Convert to fraction form
    5,128.50/7,691.96 = 1,430.34/x
  3. Step 3: Cross multiply
    5,128.50x = 7,691.96 × 1,430.34
  4. Step 4: Simplify right side
    5,128.50x = 11,002,118.07
  5. Step 5: Solve for x
    x = 11,002,118.07/5,128.50
  6. Step 6: Final answer
    x = 2,145.29

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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.