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Finding the Fourth Proportional to 19,433.40, 29,111.70 and 13,212.60

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Solution

The fourth proportional to 19,433.40, 29,111.70 and 13,212.60 is: 19,792.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,433.40 : 29,111.70 = 13,212.60 : x
  2. Step 2: Convert to fraction form
    19,433.40/29,111.70 = 13,212.60/x
  3. Step 3: Cross multiply
    19,433.40x = 29,111.70 × 13,212.60
  4. Step 4: Simplify right side
    19,433.40x = 384,641,247.42
  5. Step 5: Solve for x
    x = 384,641,247.42/19,433.40
  6. Step 6: Final answer
    x = 19,792.79

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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.