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Finding the Fourth Proportional to 30,345.98, 41,878.17 and 16,916.90

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Solution

The fourth proportional to 30,345.98, 41,878.17 and 16,916.90 is: 23,345.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,345.98 : 41,878.17 = 16,916.90 : x
  2. Step 2: Convert to fraction form
    30,345.98/41,878.17 = 16,916.90/x
  3. Step 3: Cross multiply
    30,345.98x = 41,878.17 × 16,916.90
  4. Step 4: Simplify right side
    30,345.98x = 708,448,604.68
  5. Step 5: Solve for x
    x = 708,448,604.68/30,345.98
  6. Step 6: Final answer
    x = 23,345.71

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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.