Home / 5,109.30-7,050.80-3,119.47

Finding the Fourth Proportional to 5,109.30, 7,050.80 and 3,119.47

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Solution

The fourth proportional to 5,109.30, 7,050.80 and 3,119.47 is: 4,304.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,109.30 : 7,050.80 = 3,119.47 : x
  2. Step 2: Convert to fraction form
    5,109.30/7,050.80 = 3,119.47/x
  3. Step 3: Cross multiply
    5,109.30x = 7,050.80 × 3,119.47
  4. Step 4: Simplify right side
    5,109.30x = 21,994,749.25
  5. Step 5: Solve for x
    x = 21,994,749.25/5,109.30
  6. Step 6: Final answer
    x = 4,304.85

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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.