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Finding the Fourth Proportional to 29,619.56, 40,805.50 and 20,650.76

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Solution

The fourth proportional to 29,619.56, 40,805.50 and 20,650.76 is: 28,449.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,619.56 : 40,805.50 = 20,650.76 : x
  2. Step 2: Convert to fraction form
    29,619.56/40,805.50 = 20,650.76/x
  3. Step 3: Cross multiply
    29,619.56x = 40,805.50 × 20,650.76
  4. Step 4: Simplify right side
    29,619.56x = 842,664,587.18
  5. Step 5: Solve for x
    x = 842,664,587.18/29,619.56
  6. Step 6: Final answer
    x = 28,449.60

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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.