Home / 21,090.51-31,616.33-7,933.95

Finding the Fourth Proportional to 21,090.51, 31,616.33 and 7,933.95

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Solution

The fourth proportional to 21,090.51, 31,616.33 and 7,933.95 is: 11,893.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.51 : 31,616.33 = 7,933.95 : x
  2. Step 2: Convert to fraction form
    21,090.51/31,616.33 = 7,933.95/x
  3. Step 3: Cross multiply
    21,090.51x = 31,616.33 × 7,933.95
  4. Step 4: Simplify right side
    21,090.51x = 250,842,341.73
  5. Step 5: Solve for x
    x = 250,842,341.73/21,090.51
  6. Step 6: Final answer
    x = 11,893.61

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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.