Home / 7,128.25-10,696.83-3,430.87

Finding the Fourth Proportional to 7,128.25, 10,696.83 and 3,430.87

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Solution

The fourth proportional to 7,128.25, 10,696.83 and 3,430.87 is: 5,148.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.25 : 10,696.83 = 3,430.87 : x
  2. Step 2: Convert to fraction form
    7,128.25/10,696.83 = 3,430.87/x
  3. Step 3: Cross multiply
    7,128.25x = 10,696.83 × 3,430.87
  4. Step 4: Simplify right side
    7,128.25x = 36,699,433.14
  5. Step 5: Solve for x
    x = 36,699,433.14/7,128.25
  6. Step 6: Final answer
    x = 5,148.45

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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.