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Finding the Fourth Proportional to 10,661.84, 15,990.96 and 2,868.92

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Solution

The fourth proportional to 10,661.84, 15,990.96 and 2,868.92 is: 4,302.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,661.84 : 15,990.96 = 2,868.92 : x
  2. Step 2: Convert to fraction form
    10,661.84/15,990.96 = 2,868.92/x
  3. Step 3: Cross multiply
    10,661.84x = 15,990.96 × 2,868.92
  4. Step 4: Simplify right side
    10,661.84x = 45,876,784.96
  5. Step 5: Solve for x
    x = 45,876,784.96/10,661.84
  6. Step 6: Final answer
    x = 4,302.90

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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.