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Finding the Fourth Proportional to 19,361.70, 26,719.74 and 13,706.55

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Solution

The fourth proportional to 19,361.70, 26,719.74 and 13,706.55 is: 18,915.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,361.70 : 26,719.74 = 13,706.55 : x
  2. Step 2: Convert to fraction form
    19,361.70/26,719.74 = 13,706.55/x
  3. Step 3: Cross multiply
    19,361.70x = 26,719.74 × 13,706.55
  4. Step 4: Simplify right side
    19,361.70x = 366,235,452.30
  5. Step 5: Solve for x
    x = 366,235,452.30/19,361.70
  6. Step 6: Final answer
    x = 18,915.46

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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.