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Finding the Fourth Proportional to 12,486.29, 18,733.86 and 7,800.89

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Solution

The fourth proportional to 12,486.29, 18,733.86 and 7,800.89 is: 11,704.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,486.29 : 18,733.86 = 7,800.89 : x
  2. Step 2: Convert to fraction form
    12,486.29/18,733.86 = 7,800.89/x
  3. Step 3: Cross multiply
    12,486.29x = 18,733.86 × 7,800.89
  4. Step 4: Simplify right side
    12,486.29x = 146,140,687.47
  5. Step 5: Solve for x
    x = 146,140,687.47/12,486.29
  6. Step 6: Final answer
    x = 11,704.10

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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.