Home / 21,133.31-29,163.92-12,180.75

Finding the Fourth Proportional to 21,133.31, 29,163.92 and 12,180.75

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Solution

The fourth proportional to 21,133.31, 29,163.92 and 12,180.75 is: 16,809.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,133.31 : 29,163.92 = 12,180.75 : x
  2. Step 2: Convert to fraction form
    21,133.31/29,163.92 = 12,180.75/x
  3. Step 3: Cross multiply
    21,133.31x = 29,163.92 × 12,180.75
  4. Step 4: Simplify right side
    21,133.31x = 355,238,248.27
  5. Step 5: Solve for x
    x = 355,238,248.27/21,133.31
  6. Step 6: Final answer
    x = 16,809.40

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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.