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Finding the Fourth Proportional to 13,762.60, 20,643.90 and 8,222.20

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Solution

The fourth proportional to 13,762.60, 20,643.90 and 8,222.20 is: 12,333.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,762.60 : 20,643.90 = 8,222.20 : x
  2. Step 2: Convert to fraction form
    13,762.60/20,643.90 = 8,222.20/x
  3. Step 3: Cross multiply
    13,762.60x = 20,643.90 × 8,222.20
  4. Step 4: Simplify right side
    13,762.60x = 169,738,274.58
  5. Step 5: Solve for x
    x = 169,738,274.58/13,762.60
  6. Step 6: Final answer
    x = 12,333.30

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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.