Home / 21,133.76-31,696.80-6,339.20

Finding the Fourth Proportional to 21,133.76, 31,696.80 and 6,339.20

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Solution

The fourth proportional to 21,133.76, 31,696.80 and 6,339.20 is: 9,507.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,133.76 : 31,696.80 = 6,339.20 : x
  2. Step 2: Convert to fraction form
    21,133.76/31,696.80 = 6,339.20/x
  3. Step 3: Cross multiply
    21,133.76x = 31,696.80 × 6,339.20
  4. Step 4: Simplify right side
    21,133.76x = 200,932,354.56
  5. Step 5: Solve for x
    x = 200,932,354.56/21,133.76
  6. Step 6: Final answer
    x = 9,507.65

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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.