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Finding the Fourth Proportional to 28,249.92, 38,980.56 and 16,916.76

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Solution

The fourth proportional to 28,249.92, 38,980.56 and 16,916.76 is: 23,342.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,249.92 : 38,980.56 = 16,916.76 : x
  2. Step 2: Convert to fraction form
    28,249.92/38,980.56 = 16,916.76/x
  3. Step 3: Cross multiply
    28,249.92x = 38,980.56 × 16,916.76
  4. Step 4: Simplify right side
    28,249.92x = 659,424,778.19
  5. Step 5: Solve for x
    x = 659,424,778.19/28,249.92
  6. Step 6: Final answer
    x = 23,342.54

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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.