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Finding the Fourth Proportional to 19,953.82, 29,920.22 and 8,855.74

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Solution

The fourth proportional to 19,953.82, 29,920.22 and 8,855.74 is: 13,278.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,953.82 : 29,920.22 = 8,855.74 : x
  2. Step 2: Convert to fraction form
    19,953.82/29,920.22 = 8,855.74/x
  3. Step 3: Cross multiply
    19,953.82x = 29,920.22 × 8,855.74
  4. Step 4: Simplify right side
    19,953.82x = 264,965,561.60
  5. Step 5: Solve for x
    x = 264,965,561.60/19,953.82
  6. Step 6: Final answer
    x = 13,278.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.