Home / 21,191.58-31,781.79-10,076.13

Finding the Fourth Proportional to 21,191.58, 31,781.79 and 10,076.13

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Solution

The fourth proportional to 21,191.58, 31,781.79 and 10,076.13 is: 15,111.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.58 : 31,781.79 = 10,076.13 : x
  2. Step 2: Convert to fraction form
    21,191.58/31,781.79 = 10,076.13/x
  3. Step 3: Cross multiply
    21,191.58x = 31,781.79 × 10,076.13
  4. Step 4: Simplify right side
    21,191.58x = 320,237,447.67
  5. Step 5: Solve for x
    x = 320,237,447.67/21,191.58
  6. Step 6: Final answer
    x = 15,111.54

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1.5x scale

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.