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Finding the Fourth Proportional to 12,651.26, 18,978.51 and 4,859.06

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Solution

The fourth proportional to 12,651.26, 18,978.51 and 4,859.06 is: 7,289.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.26 : 18,978.51 = 4,859.06 : x
  2. Step 2: Convert to fraction form
    12,651.26/18,978.51 = 4,859.06/x
  3. Step 3: Cross multiply
    12,651.26x = 18,978.51 × 4,859.06
  4. Step 4: Simplify right side
    12,651.26x = 92,217,718.80
  5. Step 5: Solve for x
    x = 92,217,718.80/12,651.26
  6. Step 6: Final answer
    x = 7,289.21

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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.