Home / 5,109.52-7,051.90-3,121.22

Finding the Fourth Proportional to 5,109.52, 7,051.90 and 3,121.22

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Solution

The fourth proportional to 5,109.52, 7,051.90 and 3,121.22 is: 4,307.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,109.52 : 7,051.90 = 3,121.22 : x
  2. Step 2: Convert to fraction form
    5,109.52/7,051.90 = 3,121.22/x
  3. Step 3: Cross multiply
    5,109.52x = 7,051.90 × 3,121.22
  4. Step 4: Simplify right side
    5,109.52x = 22,010,531.32
  5. Step 5: Solve for x
    x = 22,010,531.32/5,109.52
  6. Step 6: Final answer
    x = 4,307.75

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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.