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Finding the Fourth Proportional to 29,430.15, 40,622.90 and 18,819.83

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Solution

The fourth proportional to 29,430.15, 40,622.90 and 18,819.83 is: 25,977.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,430.15 : 40,622.90 = 18,819.83 : x
  2. Step 2: Convert to fraction form
    29,430.15/40,622.90 = 18,819.83/x
  3. Step 3: Cross multiply
    29,430.15x = 40,622.90 × 18,819.83
  4. Step 4: Simplify right side
    29,430.15x = 764,515,774.89
  5. Step 5: Solve for x
    x = 764,515,774.89/29,430.15
  6. Step 6: Final answer
    x = 25,977.30

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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.