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Finding the Fourth Proportional to 19,761.90, 27,270.03 and 10,809.21

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Solution

The fourth proportional to 19,761.90, 27,270.03 and 10,809.21 is: 14,915.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,761.90 : 27,270.03 = 10,809.21 : x
  2. Step 2: Convert to fraction form
    19,761.90/27,270.03 = 10,809.21/x
  3. Step 3: Cross multiply
    19,761.90x = 27,270.03 × 10,809.21
  4. Step 4: Simplify right side
    19,761.90x = 294,767,480.98
  5. Step 5: Solve for x
    x = 294,767,480.98/19,761.90
  6. Step 6: Final answer
    x = 14,915.95

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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.