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Finding the Fourth Proportional to 45,758.72, 68,621.99 and 13,728.23

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Solution

The fourth proportional to 45,758.72, 68,621.99 and 13,728.23 is: 20,587.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,758.72 : 68,621.99 = 13,728.23 : x
  2. Step 2: Convert to fraction form
    45,758.72/68,621.99 = 13,728.23/x
  3. Step 3: Cross multiply
    45,758.72x = 68,621.99 × 13,728.23
  4. Step 4: Simplify right side
    45,758.72x = 942,058,050.03
  5. Step 5: Solve for x
    x = 942,058,050.03/45,758.72
  6. Step 6: Final answer
    x = 20,587.51

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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.