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Finding the Fourth Proportional to 19,765.86, 29,648.61 and 8,070.87

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Solution

The fourth proportional to 19,765.86, 29,648.61 and 8,070.87 is: 12,106.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,765.86 : 29,648.61 = 8,070.87 : x
  2. Step 2: Convert to fraction form
    19,765.86/29,648.61 = 8,070.87/x
  3. Step 3: Cross multiply
    19,765.86x = 29,648.61 × 8,070.87
  4. Step 4: Simplify right side
    19,765.86x = 239,290,076.99
  5. Step 5: Solve for x
    x = 239,290,076.99/19,765.86
  6. Step 6: Final answer
    x = 12,106.23

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