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Finding the Fourth Proportional to 8,722.16, 12,023.88 and 6,622.64

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Solution

The fourth proportional to 8,722.16, 12,023.88 and 6,622.64 is: 9,129.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,722.16 : 12,023.88 = 6,622.64 : x
  2. Step 2: Convert to fraction form
    8,722.16/12,023.88 = 6,622.64/x
  3. Step 3: Cross multiply
    8,722.16x = 12,023.88 × 6,622.64
  4. Step 4: Simplify right side
    8,722.16x = 79,629,828.64
  5. Step 5: Solve for x
    x = 79,629,828.64/8,722.16
  6. Step 6: Final answer
    x = 9,129.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.