Home / 5,128.09-7,079.98-3,140.65

Finding the Fourth Proportional to 5,128.09, 7,079.98 and 3,140.65

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Solution

The fourth proportional to 5,128.09, 7,079.98 and 3,140.65 is: 4,336.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.09 : 7,079.98 = 3,140.65 : x
  2. Step 2: Convert to fraction form
    5,128.09/7,079.98 = 3,140.65/x
  3. Step 3: Cross multiply
    5,128.09x = 7,079.98 × 3,140.65
  4. Step 4: Simplify right side
    5,128.09x = 22,235,739.19
  5. Step 5: Solve for x
    x = 22,235,739.19/5,128.09
  6. Step 6: Final answer
    x = 4,336.07

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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.