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Finding the Fourth Proportional to 19,811.79, 29,707.02 and 8,705.70

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Solution

The fourth proportional to 19,811.79, 29,707.02 and 8,705.70 is: 13,053.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,811.79 : 29,707.02 = 8,705.70 : x
  2. Step 2: Convert to fraction form
    19,811.79/29,707.02 = 8,705.70/x
  3. Step 3: Cross multiply
    19,811.79x = 29,707.02 × 8,705.70
  4. Step 4: Simplify right side
    19,811.79x = 258,620,404.01
  5. Step 5: Solve for x
    x = 258,620,404.01/19,811.79
  6. Step 6: Final answer
    x = 13,053.86

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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.