Home / 21,587.88-29,791.82-12,156.76

Finding the Fourth Proportional to 21,587.88, 29,791.82 and 12,156.76

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Solution

The fourth proportional to 21,587.88, 29,791.82 and 12,156.76 is: 16,776.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,587.88 : 29,791.82 = 12,156.76 : x
  2. Step 2: Convert to fraction form
    21,587.88/29,791.82 = 12,156.76/x
  3. Step 3: Cross multiply
    21,587.88x = 29,791.82 × 12,156.76
  4. Step 4: Simplify right side
    21,587.88x = 362,172,005.70
  5. Step 5: Solve for x
    x = 362,172,005.70/21,587.88
  6. Step 6: Final answer
    x = 16,776.64

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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.