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Finding the Fourth Proportional to 12,995.82, 19,491.71 and 4,230.68

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Solution

The fourth proportional to 12,995.82, 19,491.71 and 4,230.68 is: 6,345.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,995.82 : 19,491.71 = 4,230.68 : x
  2. Step 2: Convert to fraction form
    12,995.82/19,491.71 = 4,230.68/x
  3. Step 3: Cross multiply
    12,995.82x = 19,491.71 × 4,230.68
  4. Step 4: Simplify right side
    12,995.82x = 82,463,069.05
  5. Step 5: Solve for x
    x = 82,463,069.05/12,995.82
  6. Step 6: Final answer
    x = 6,345.35

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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.