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Finding the Fourth Proportional to 19,858.66, 29,788.74 and 9,992.56

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Solution

The fourth proportional to 19,858.66, 29,788.74 and 9,992.56 is: 14,989.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,858.66 : 29,788.74 = 9,992.56 : x
  2. Step 2: Convert to fraction form
    19,858.66/29,788.74 = 9,992.56/x
  3. Step 3: Cross multiply
    19,858.66x = 29,788.74 × 9,992.56
  4. Step 4: Simplify right side
    19,858.66x = 297,665,771.77
  5. Step 5: Solve for x
    x = 297,665,771.77/19,858.66
  6. Step 6: Final answer
    x = 14,989.22

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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.