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Finding the Fourth Proportional to 40,709.85, 61,073.48 and 12,629.30

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Solution

The fourth proportional to 40,709.85, 61,073.48 and 12,629.30 is: 18,946.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,709.85 : 61,073.48 = 12,629.30 : x
  2. Step 2: Convert to fraction form
    40,709.85/61,073.48 = 12,629.30/x
  3. Step 3: Cross multiply
    40,709.85x = 61,073.48 × 12,629.30
  4. Step 4: Simplify right side
    40,709.85x = 771,315,300.96
  5. Step 5: Solve for x
    x = 771,315,300.96/40,709.85
  6. Step 6: Final answer
    x = 18,946.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.