Home / 5,131.04-7,078.52-3,140.80

Finding the Fourth Proportional to 5,131.04, 7,078.52 and 3,140.80

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Solution

The fourth proportional to 5,131.04, 7,078.52 and 3,140.80 is: 4,332.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,131.04 : 7,078.52 = 3,140.80 : x
  2. Step 2: Convert to fraction form
    5,131.04/7,078.52 = 3,140.80/x
  3. Step 3: Cross multiply
    5,131.04x = 7,078.52 × 3,140.80
  4. Step 4: Simplify right side
    5,131.04x = 22,232,215.62
  5. Step 5: Solve for x
    x = 22,232,215.62/5,131.04
  6. Step 6: Final answer
    x = 4,332.89

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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.