Home / 19,938.20-29,880.30-12,896.60

Finding the Fourth Proportional to 19,938.20, 29,880.30 and 12,896.60

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Solution

The fourth proportional to 19,938.20, 29,880.30 and 12,896.60 is: 19,327.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,938.20 : 29,880.30 = 12,896.60 : x
  2. Step 2: Convert to fraction form
    19,938.20/29,880.30 = 12,896.60/x
  3. Step 3: Cross multiply
    19,938.20x = 29,880.30 × 12,896.60
  4. Step 4: Simplify right side
    19,938.20x = 385,354,276.98
  5. Step 5: Solve for x
    x = 385,354,276.98/19,938.20
  6. Step 6: Final answer
    x = 19,327.44

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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.