Home / 21,135.94-31,708.77-7,284.94

Finding the Fourth Proportional to 21,135.94, 31,708.77 and 7,284.94

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Solution

The fourth proportional to 21,135.94, 31,708.77 and 7,284.94 is: 10,929.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.94 : 31,708.77 = 7,284.94 : x
  2. Step 2: Convert to fraction form
    21,135.94/31,708.77 = 7,284.94/x
  3. Step 3: Cross multiply
    21,135.94x = 31,708.77 × 7,284.94
  4. Step 4: Simplify right side
    21,135.94x = 230,996,380.33
  5. Step 5: Solve for x
    x = 230,996,380.33/21,135.94
  6. Step 6: Final answer
    x = 10,929.08

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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.