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Finding the Fourth Proportional to 19,319.56, 28,993.98 and 12,743.56

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Solution

The fourth proportional to 19,319.56, 28,993.98 and 12,743.56 is: 19,125.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,319.56 : 28,993.98 = 12,743.56 : x
  2. Step 2: Convert to fraction form
    19,319.56/28,993.98 = 12,743.56/x
  3. Step 3: Cross multiply
    19,319.56x = 28,993.98 × 12,743.56
  4. Step 4: Simplify right side
    19,319.56x = 369,486,523.77
  5. Step 5: Solve for x
    x = 369,486,523.77/19,319.56
  6. Step 6: Final answer
    x = 19,125.00

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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.