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Finding the Fourth Proportional to 28,369.26, 42,561.41 and 8,647.99

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Solution

The fourth proportional to 28,369.26, 42,561.41 and 8,647.99 is: 12,974.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,369.26 : 42,561.41 = 8,647.99 : x
  2. Step 2: Convert to fraction form
    28,369.26/42,561.41 = 8,647.99/x
  3. Step 3: Cross multiply
    28,369.26x = 42,561.41 × 8,647.99
  4. Step 4: Simplify right side
    28,369.26x = 368,070,648.07
  5. Step 5: Solve for x
    x = 368,070,648.07/28,369.26
  6. Step 6: Final answer
    x = 12,974.28

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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.