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Finding the Fourth Proportional to 7,199.60, 9,935.19 and 4,012.79

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Solution

The fourth proportional to 7,199.60, 9,935.19 and 4,012.79 is: 5,537.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,199.60 : 9,935.19 = 4,012.79 : x
  2. Step 2: Convert to fraction form
    7,199.60/9,935.19 = 4,012.79/x
  3. Step 3: Cross multiply
    7,199.60x = 9,935.19 × 4,012.79
  4. Step 4: Simplify right side
    7,199.60x = 39,867,781.40
  5. Step 5: Solve for x
    x = 39,867,781.40/7,199.60
  6. Step 6: Final answer
    x = 5,537.50

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Double scale
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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.