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Finding the Fourth Proportional to 12,651.81, 18,977.74 and 3,886.67

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Solution

The fourth proportional to 12,651.81, 18,977.74 and 3,886.67 is: 5,830.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.81 : 18,977.74 = 3,886.67 : x
  2. Step 2: Convert to fraction form
    12,651.81/18,977.74 = 3,886.67/x
  3. Step 3: Cross multiply
    12,651.81x = 18,977.74 × 3,886.67
  4. Step 4: Simplify right side
    12,651.81x = 73,760,108.12
  5. Step 5: Solve for x
    x = 73,760,108.12/12,651.81
  6. Step 6: Final answer
    x = 5,830.00

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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.