Home / 2,991.75-4,129.83-2,152.59

Finding the Fourth Proportional to 2,991.75, 4,129.83 and 2,152.59

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Solution

The fourth proportional to 2,991.75, 4,129.83 and 2,152.59 is: 2,971.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.75 : 4,129.83 = 2,152.59 : x
  2. Step 2: Convert to fraction form
    2,991.75/4,129.83 = 2,152.59/x
  3. Step 3: Cross multiply
    2,991.75x = 4,129.83 × 2,152.59
  4. Step 4: Simplify right side
    2,991.75x = 8,889,830.76
  5. Step 5: Solve for x
    x = 8,889,830.76/2,991.75
  6. Step 6: Final answer
    x = 2,971.45

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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.