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Finding the Fourth Proportional to 14,076.80, 21,118.08 and 8,230.40

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Solution

The fourth proportional to 14,076.80, 21,118.08 and 8,230.40 is: 12,347.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,076.80 : 21,118.08 = 8,230.40 : x
  2. Step 2: Convert to fraction form
    14,076.80/21,118.08 = 8,230.40/x
  3. Step 3: Cross multiply
    14,076.80x = 21,118.08 × 8,230.40
  4. Step 4: Simplify right side
    14,076.80x = 173,810,245.63
  5. Step 5: Solve for x
    x = 173,810,245.63/14,076.80
  6. Step 6: Final answer
    x = 12,347.28

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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.