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Finding the Fourth Proportional to 12,287.72, 18,431.70 and 3,053.72

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Solution

The fourth proportional to 12,287.72, 18,431.70 and 3,053.72 is: 4,580.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,287.72 : 18,431.70 = 3,053.72 : x
  2. Step 2: Convert to fraction form
    12,287.72/18,431.70 = 3,053.72/x
  3. Step 3: Cross multiply
    12,287.72x = 18,431.70 × 3,053.72
  4. Step 4: Simplify right side
    12,287.72x = 56,285,250.92
  5. Step 5: Solve for x
    x = 56,285,250.92/12,287.72
  6. Step 6: Final answer
    x = 4,580.61

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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.