Home / 21,738.31-29,998.98-12,308.71

Finding the Fourth Proportional to 21,738.31, 29,998.98 and 12,308.71

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Solution

The fourth proportional to 21,738.31, 29,998.98 and 12,308.71 is: 16,986.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,738.31 : 29,998.98 = 12,308.71 : x
  2. Step 2: Convert to fraction form
    21,738.31/29,998.98 = 12,308.71/x
  3. Step 3: Cross multiply
    21,738.31x = 29,998.98 × 12,308.71
  4. Step 4: Simplify right side
    21,738.31x = 369,248,745.12
  5. Step 5: Solve for x
    x = 369,248,745.12/21,738.31
  6. Step 6: Final answer
    x = 16,986.08

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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.