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Finding the Fourth Proportional to 29,311, 40,449.66 and 20,941.72

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Solution

The fourth proportional to 29,311, 40,449.66 and 20,941.72 is: 28,899.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,311 : 40,449.66 = 20,941.72 : x
  2. Step 2: Convert to fraction form
    29,311/40,449.66 = 20,941.72/x
  3. Step 3: Cross multiply
    29,311x = 40,449.66 × 20,941.72
  4. Step 4: Simplify right side
    29,311x = 847,085,453.82
  5. Step 5: Solve for x
    x = 847,085,453.82/29,311
  6. Step 6: Final answer
    x = 28,899.92

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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.