Home / 2,121.63-2,927.36-1,375.50

Finding the Fourth Proportional to 2,121.63, 2,927.36 and 1,375.50

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Solution

The fourth proportional to 2,121.63, 2,927.36 and 1,375.50 is: 1,897.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.63 : 2,927.36 = 1,375.50 : x
  2. Step 2: Convert to fraction form
    2,121.63/2,927.36 = 1,375.50/x
  3. Step 3: Cross multiply
    2,121.63x = 2,927.36 × 1,375.50
  4. Step 4: Simplify right side
    2,121.63x = 4,026,576.80
  5. Step 5: Solve for x
    x = 4,026,576.80/2,121.63
  6. Step 6: Final answer
    x = 1,897.87

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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.