Home / 5,127.09-7,078.60-3,139.65

Finding the Fourth Proportional to 5,127.09, 7,078.60 and 3,139.65

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Solution

The fourth proportional to 5,127.09, 7,078.60 and 3,139.65 is: 4,334.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,127.09 : 7,078.60 = 3,139.65 : x
  2. Step 2: Convert to fraction form
    5,127.09/7,078.60 = 3,139.65/x
  3. Step 3: Cross multiply
    5,127.09x = 7,078.60 × 3,139.65
  4. Step 4: Simplify right side
    5,127.09x = 22,224,326.49
  5. Step 5: Solve for x
    x = 22,224,326.49/5,127.09
  6. Step 6: Final answer
    x = 4,334.69

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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.