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Finding the Fourth Proportional to 19,128.40, 26,392.87 and 11,574.54

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Solution

The fourth proportional to 19,128.40, 26,392.87 and 11,574.54 is: 15,970.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,128.40 : 26,392.87 = 11,574.54 : x
  2. Step 2: Convert to fraction form
    19,128.40/26,392.87 = 11,574.54/x
  3. Step 3: Cross multiply
    19,128.40x = 26,392.87 × 11,574.54
  4. Step 4: Simplify right side
    19,128.40x = 305,485,329.53
  5. Step 5: Solve for x
    x = 305,485,329.53/19,128.40
  6. Step 6: Final answer
    x = 15,970.25

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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.