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Finding the Fourth Proportional to 13,772.64, 18,751.98 and 13,728.90

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Solution

The fourth proportional to 13,772.64, 18,751.98 and 13,728.90 is: 18,692.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,772.64 : 18,751.98 = 13,728.90 : x
  2. Step 2: Convert to fraction form
    13,772.64/18,751.98 = 13,728.90/x
  3. Step 3: Cross multiply
    13,772.64x = 18,751.98 × 13,728.90
  4. Step 4: Simplify right side
    13,772.64x = 257,444,058.22
  5. Step 5: Solve for x
    x = 257,444,058.22/13,772.64
  6. Step 6: Final answer
    x = 18,692.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.