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Finding the Fourth Proportional to 19,930.40, 29,895.60 and 8,237.60

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Solution

The fourth proportional to 19,930.40, 29,895.60 and 8,237.60 is: 12,356.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,930.40 : 29,895.60 = 8,237.60 : x
  2. Step 2: Convert to fraction form
    19,930.40/29,895.60 = 8,237.60/x
  3. Step 3: Cross multiply
    19,930.40x = 29,895.60 × 8,237.60
  4. Step 4: Simplify right side
    19,930.40x = 246,267,994.56
  5. Step 5: Solve for x
    x = 246,267,994.56/19,930.40
  6. Step 6: Final answer
    x = 12,356.40

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1.5x scale

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.