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Finding the Fourth Proportional to 12,492.72, 18,739.68 and 3,728.32

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Solution

The fourth proportional to 12,492.72, 18,739.68 and 3,728.32 is: 5,592.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,492.72 : 18,739.68 = 3,728.32 : x
  2. Step 2: Convert to fraction form
    12,492.72/18,739.68 = 3,728.32/x
  3. Step 3: Cross multiply
    12,492.72x = 18,739.68 × 3,728.32
  4. Step 4: Simplify right side
    12,492.72x = 69,867,523.74
  5. Step 5: Solve for x
    x = 69,867,523.74/12,492.72
  6. Step 6: Final answer
    x = 5,592.66

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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.