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Finding the Fourth Proportional to 19,040, 26,286.72 and 12,427.52

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Solution

The fourth proportional to 19,040, 26,286.72 and 12,427.52 is: 17,157.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,040 : 26,286.72 = 12,427.52 : x
  2. Step 2: Convert to fraction form
    19,040/26,286.72 = 12,427.52/x
  3. Step 3: Cross multiply
    19,040x = 26,286.72 × 12,427.52
  4. Step 4: Simplify right side
    19,040x = 326,678,738.53
  5. Step 5: Solve for x
    x = 326,678,738.53/19,040
  6. Step 6: Final answer
    x = 17,157.50

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.