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Finding the Fourth Proportional to 19,989.44, 29,984.16 and 6,138.44

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Solution

The fourth proportional to 19,989.44, 29,984.16 and 6,138.44 is: 9,207.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,989.44 : 29,984.16 = 6,138.44 : x
  2. Step 2: Convert to fraction form
    19,989.44/29,984.16 = 6,138.44/x
  3. Step 3: Cross multiply
    19,989.44x = 29,984.16 × 6,138.44
  4. Step 4: Simplify right side
    19,989.44x = 184,055,967.11
  5. Step 5: Solve for x
    x = 184,055,967.11/19,989.44
  6. Step 6: Final answer
    x = 9,207.66

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Similar ratio
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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.