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Finding the Fourth Proportional to 9,865.80, 14,728.41 and 9,519.80

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Solution

The fourth proportional to 9,865.80, 14,728.41 and 9,519.80 is: 14,211.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,865.80 : 14,728.41 = 9,519.80 : x
  2. Step 2: Convert to fraction form
    9,865.80/14,728.41 = 9,519.80/x
  3. Step 3: Cross multiply
    9,865.80x = 14,728.41 × 9,519.80
  4. Step 4: Simplify right side
    9,865.80x = 140,211,443.88
  5. Step 5: Solve for x
    x = 140,211,443.88/9,865.80
  6. Step 6: Final answer
    x = 14,211.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.