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Finding the Fourth Proportional to 12,790.62, 19,188.68 and 7,246.62

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Solution

The fourth proportional to 12,790.62, 19,188.68 and 7,246.62 is: 10,871.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,790.62 : 19,188.68 = 7,246.62 : x
  2. Step 2: Convert to fraction form
    12,790.62/19,188.68 = 7,246.62/x
  3. Step 3: Cross multiply
    12,790.62x = 19,188.68 × 7,246.62
  4. Step 4: Simplify right side
    12,790.62x = 139,053,036.03
  5. Step 5: Solve for x
    x = 139,053,036.03/12,790.62
  6. Step 6: Final answer
    x = 10,871.49

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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.