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Finding the Fourth Proportional to 9,883.98, 13,640.21 and 5,407.73

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Solution

The fourth proportional to 9,883.98, 13,640.21 and 5,407.73 is: 7,462.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,883.98 : 13,640.21 = 5,407.73 : x
  2. Step 2: Convert to fraction form
    9,883.98/13,640.21 = 5,407.73/x
  3. Step 3: Cross multiply
    9,883.98x = 13,640.21 × 5,407.73
  4. Step 4: Simplify right side
    9,883.98x = 73,762,549.01
  5. Step 5: Solve for x
    x = 73,762,549.01/9,883.98
  6. Step 6: Final answer
    x = 7,462.84

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Double scale
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Similar ratio
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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.