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Finding the Fourth Proportional to 21,658.77, 29,886.93 and 12,097.89

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Solution

The fourth proportional to 21,658.77, 29,886.93 and 12,097.89 is: 16,693.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,658.77 : 29,886.93 = 12,097.89 : x
  2. Step 2: Convert to fraction form
    21,658.77/29,886.93 = 12,097.89/x
  3. Step 3: Cross multiply
    21,658.77x = 29,886.93 × 12,097.89
  4. Step 4: Simplify right side
    21,658.77x = 361,568,791.58
  5. Step 5: Solve for x
    x = 361,568,791.58/21,658.77
  6. Step 6: Final answer
    x = 16,693.87

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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.