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Finding the Fourth Proportional to 19,294.20, 26,584.20 and 15,503.40

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Solution

The fourth proportional to 19,294.20, 26,584.20 and 15,503.40 is: 21,361.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,294.20 : 26,584.20 = 15,503.40 : x
  2. Step 2: Convert to fraction form
    19,294.20/26,584.20 = 15,503.40/x
  3. Step 3: Cross multiply
    19,294.20x = 26,584.20 × 15,503.40
  4. Step 4: Simplify right side
    19,294.20x = 412,145,486.28
  5. Step 5: Solve for x
    x = 412,145,486.28/19,294.20
  6. Step 6: Final answer
    x = 21,361.11

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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.