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Finding the Fourth Proportional to 28,640.67, 39,524.03 and 15,895.77

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Solution

The fourth proportional to 28,640.67, 39,524.03 and 15,895.77 is: 21,936.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,640.67 : 39,524.03 = 15,895.77 : x
  2. Step 2: Convert to fraction form
    28,640.67/39,524.03 = 15,895.77/x
  3. Step 3: Cross multiply
    28,640.67x = 39,524.03 × 15,895.77
  4. Step 4: Simplify right side
    28,640.67x = 628,264,890.35
  5. Step 5: Solve for x
    x = 628,264,890.35/28,640.67
  6. Step 6: Final answer
    x = 21,936.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.