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Finding the Fourth Proportional to 10,661.88, 15,992.81 and 2,870.69

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Solution

The fourth proportional to 10,661.88, 15,992.81 and 2,870.69 is: 4,306.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,661.88 : 15,992.81 = 2,870.69 : x
  2. Step 2: Convert to fraction form
    10,661.88/15,992.81 = 2,870.69/x
  3. Step 3: Cross multiply
    10,661.88x = 15,992.81 × 2,870.69
  4. Step 4: Simplify right side
    10,661.88x = 45,910,366.93
  5. Step 5: Solve for x
    x = 45,910,366.93/10,661.88
  6. Step 6: Final answer
    x = 4,306.03

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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.