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Finding the Fourth Proportional to 14,647.20, 21,922.20 and 12,897.60

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Solution

The fourth proportional to 14,647.20, 21,922.20 and 12,897.60 is: 19,303.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,647.20 : 21,922.20 = 12,897.60 : x
  2. Step 2: Convert to fraction form
    14,647.20/21,922.20 = 12,897.60/x
  3. Step 3: Cross multiply
    14,647.20x = 21,922.20 × 12,897.60
  4. Step 4: Simplify right side
    14,647.20x = 282,743,766.72
  5. Step 5: Solve for x
    x = 282,743,766.72/14,647.20
  6. Step 6: Final answer
    x = 19,303.61

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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.