Home / 5,121.74-7,685.59-2,160.00

Finding the Fourth Proportional to 5,121.74, 7,685.59 and 2,160.00

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Solution

The fourth proportional to 5,121.74, 7,685.59 and 2,160.00 is: 3,241.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.74 : 7,685.59 = 2,160.00 : x
  2. Step 2: Convert to fraction form
    5,121.74/7,685.59 = 2,160.00/x
  3. Step 3: Cross multiply
    5,121.74x = 7,685.59 × 2,160.00
  4. Step 4: Simplify right side
    5,121.74x = 16,600,830.57
  5. Step 5: Solve for x
    x = 16,600,830.57/5,121.74
  6. Step 6: Final answer
    x = 3,241.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.