Home / 21,137.20-31,696.45-6,343.28

Finding the Fourth Proportional to 21,137.20, 31,696.45 and 6,343.28

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Solution

The fourth proportional to 21,137.20, 31,696.45 and 6,343.28 is: 9,512.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.20 : 31,696.45 = 6,343.28 : x
  2. Step 2: Convert to fraction form
    21,137.20/31,696.45 = 6,343.28/x
  3. Step 3: Cross multiply
    21,137.20x = 31,696.45 × 6,343.28
  4. Step 4: Simplify right side
    21,137.20x = 201,059,283.02
  5. Step 5: Solve for x
    x = 201,059,283.02/21,137.20
  6. Step 6: Final answer
    x = 9,512.11

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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.