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Finding the Fourth Proportional to 12,043.20, 16,821.60 and 12,043.20

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Solution

The fourth proportional to 12,043.20, 16,821.60 and 12,043.20 is: 16,821.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,043.20 : 16,821.60 = 12,043.20 : x
  2. Step 2: Convert to fraction form
    12,043.20/16,821.60 = 12,043.20/x
  3. Step 3: Cross multiply
    12,043.20x = 16,821.60 × 12,043.20
  4. Step 4: Simplify right side
    12,043.20x = 202,585,893.12
  5. Step 5: Solve for x
    x = 202,585,893.12/12,043.20
  6. Step 6: Final answer
    x = 16,821.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.