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Finding the Fourth Proportional to 12,522.80, 18,784.20 and 11,313.20

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Solution

The fourth proportional to 12,522.80, 18,784.20 and 11,313.20 is: 16,969.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,522.80 : 18,784.20 = 11,313.20 : x
  2. Step 2: Convert to fraction form
    12,522.80/18,784.20 = 11,313.20/x
  3. Step 3: Cross multiply
    12,522.80x = 18,784.20 × 11,313.20
  4. Step 4: Simplify right side
    12,522.80x = 212,509,411.44
  5. Step 5: Solve for x
    x = 212,509,411.44/12,522.80
  6. Step 6: Final answer
    x = 16,969.80

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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.