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Finding the Fourth Proportional to 12,933, 19,399.50 and 3,699.72

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Solution

The fourth proportional to 12,933, 19,399.50 and 3,699.72 is: 5,549.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,933 : 19,399.50 = 3,699.72 : x
  2. Step 2: Convert to fraction form
    12,933/19,399.50 = 3,699.72/x
  3. Step 3: Cross multiply
    12,933x = 19,399.50 × 3,699.72
  4. Step 4: Simplify right side
    12,933x = 71,772,718.14
  5. Step 5: Solve for x
    x = 71,772,718.14/12,933
  6. Step 6: Final answer
    x = 5,549.58

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.