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Finding the Fourth Proportional to 12,262.79, 18,379.02 and 7,002.20

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Solution

The fourth proportional to 12,262.79, 18,379.02 and 7,002.20 is: 10,494.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,262.79 : 18,379.02 = 7,002.20 : x
  2. Step 2: Convert to fraction form
    12,262.79/18,379.02 = 7,002.20/x
  3. Step 3: Cross multiply
    12,262.79x = 18,379.02 × 7,002.20
  4. Step 4: Simplify right side
    12,262.79x = 128,693,573.84
  5. Step 5: Solve for x
    x = 128,693,573.84/12,262.79
  6. Step 6: Final answer
    x = 10,494.64

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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.