Home / 21,759.31-30,030.32-12,201.76

Finding the Fourth Proportional to 21,759.31, 30,030.32 and 12,201.76

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Solution

The fourth proportional to 21,759.31, 30,030.32 and 12,201.76 is: 16,839.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,759.31 : 30,030.32 = 12,201.76 : x
  2. Step 2: Convert to fraction form
    21,759.31/30,030.32 = 12,201.76/x
  3. Step 3: Cross multiply
    21,759.31x = 30,030.32 × 12,201.76
  4. Step 4: Simplify right side
    21,759.31x = 366,422,712.79
  5. Step 5: Solve for x
    x = 366,422,712.79/21,759.31
  6. Step 6: Final answer
    x = 16,839.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.