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Finding the Fourth Proportional to 10,661.37, 15,990.98 and 2,869.71

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Solution

The fourth proportional to 10,661.37, 15,990.98 and 2,869.71 is: 4,304.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,661.37 : 15,990.98 = 2,869.71 : x
  2. Step 2: Convert to fraction form
    10,661.37/15,990.98 = 2,869.71/x
  3. Step 3: Cross multiply
    10,661.37x = 15,990.98 × 2,869.71
  4. Step 4: Simplify right side
    10,661.37x = 45,889,460.87
  5. Step 5: Solve for x
    x = 45,889,460.87/10,661.37
  6. Step 6: Final answer
    x = 4,304.27

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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.