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Finding the Fourth Proportional to 8,722.42, 12,068.62 and 7,605.68

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Solution

The fourth proportional to 8,722.42, 12,068.62 and 7,605.68 is: 10,523.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,722.42 : 12,068.62 = 7,605.68 : x
  2. Step 2: Convert to fraction form
    8,722.42/12,068.62 = 7,605.68/x
  3. Step 3: Cross multiply
    8,722.42x = 12,068.62 × 7,605.68
  4. Step 4: Simplify right side
    8,722.42x = 91,789,982.40
  5. Step 5: Solve for x
    x = 91,789,982.40/8,722.42
  6. Step 6: Final answer
    x = 10,523.46

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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.