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Finding the Fourth Proportional to 29,310.58, 40,406.61 and 20,912.50

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Solution

The fourth proportional to 29,310.58, 40,406.61 and 20,912.50 is: 28,829.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,310.58 : 40,406.61 = 20,912.50 : x
  2. Step 2: Convert to fraction form
    29,310.58/40,406.61 = 20,912.50/x
  3. Step 3: Cross multiply
    29,310.58x = 40,406.61 × 20,912.50
  4. Step 4: Simplify right side
    29,310.58x = 845,003,231.63
  5. Step 5: Solve for x
    x = 845,003,231.63/29,310.58
  6. Step 6: Final answer
    x = 28,829.29

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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.