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Finding the Fourth Proportional to 29,678.94, 40,960.83 and 16,929.20

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Solution

The fourth proportional to 29,678.94, 40,960.83 and 16,929.20 is: 23,364.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,678.94 : 40,960.83 = 16,929.20 : x
  2. Step 2: Convert to fraction form
    29,678.94/40,960.83 = 16,929.20/x
  3. Step 3: Cross multiply
    29,678.94x = 40,960.83 × 16,929.20
  4. Step 4: Simplify right side
    29,678.94x = 693,433,878.43
  5. Step 5: Solve for x
    x = 693,433,878.43/29,678.94
  6. Step 6: Final answer
    x = 23,364.51

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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.