Home / 21,588.15-29,791.62-12,156.78

Finding the Fourth Proportional to 21,588.15, 29,791.62 and 12,156.78

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Solution

The fourth proportional to 21,588.15, 29,791.62 and 12,156.78 is: 16,776.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,588.15 : 29,791.62 = 12,156.78 : x
  2. Step 2: Convert to fraction form
    21,588.15/29,791.62 = 12,156.78/x
  3. Step 3: Cross multiply
    21,588.15x = 29,791.62 × 12,156.78
  4. Step 4: Simplify right side
    21,588.15x = 362,170,170.18
  5. Step 5: Solve for x
    x = 362,170,170.18/21,588.15
  6. Step 6: Final answer
    x = 16,776.34

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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.