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Finding the Fourth Proportional to 28,634.50, 39,516.02 and 21,451.68

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Solution

The fourth proportional to 28,634.50, 39,516.02 and 21,451.68 is: 29,603.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,634.50 : 39,516.02 = 21,451.68 : x
  2. Step 2: Convert to fraction form
    28,634.50/39,516.02 = 21,451.68/x
  3. Step 3: Cross multiply
    28,634.50x = 39,516.02 × 21,451.68
  4. Step 4: Simplify right side
    28,634.50x = 847,685,015.91
  5. Step 5: Solve for x
    x = 847,685,015.91/28,634.50
  6. Step 6: Final answer
    x = 29,603.63

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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.