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Finding the Fourth Proportional to 29,431.69, 40,619.41 and 16,856.44

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Solution

The fourth proportional to 29,431.69, 40,619.41 and 16,856.44 is: 23,263.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,431.69 : 40,619.41 = 16,856.44 : x
  2. Step 2: Convert to fraction form
    29,431.69/40,619.41 = 16,856.44/x
  3. Step 3: Cross multiply
    29,431.69x = 40,619.41 × 16,856.44
  4. Step 4: Simplify right side
    29,431.69x = 684,698,503.81
  5. Step 5: Solve for x
    x = 684,698,503.81/29,431.69
  6. Step 6: Final answer
    x = 23,263.99

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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.