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Finding the Fourth Proportional to 10,661.45, 15,992.57 and 2,870.46

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Solution

The fourth proportional to 10,661.45, 15,992.57 and 2,870.46 is: 4,305.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,661.45 : 15,992.57 = 2,870.46 : x
  2. Step 2: Convert to fraction form
    10,661.45/15,992.57 = 2,870.46/x
  3. Step 3: Cross multiply
    10,661.45x = 15,992.57 × 2,870.46
  4. Step 4: Simplify right side
    10,661.45x = 45,906,039.66
  5. Step 5: Solve for x
    x = 45,906,039.66/10,661.45
  6. Step 6: Final answer
    x = 4,305.80

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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.