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Finding the Fourth Proportional to 19,870.44, 29,811.62 and 8,018.11

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Solution

The fourth proportional to 19,870.44, 29,811.62 and 8,018.11 is: 12,029.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,870.44 : 29,811.62 = 8,018.11 : x
  2. Step 2: Convert to fraction form
    19,870.44/29,811.62 = 8,018.11/x
  3. Step 3: Cross multiply
    19,870.44x = 29,811.62 × 8,018.11
  4. Step 4: Simplify right side
    19,870.44x = 239,032,848.44
  5. Step 5: Solve for x
    x = 239,032,848.44/19,870.44
  6. Step 6: Final answer
    x = 12,029.57

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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.