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Finding the Fourth Proportional to 28,115.40, 42,173.38 and 11,470.98

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Solution

The fourth proportional to 28,115.40, 42,173.38 and 11,470.98 is: 17,206.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.40 : 42,173.38 = 11,470.98 : x
  2. Step 2: Convert to fraction form
    28,115.40/42,173.38 = 11,470.98/x
  3. Step 3: Cross multiply
    28,115.40x = 42,173.38 × 11,470.98
  4. Step 4: Simplify right side
    28,115.40x = 483,769,998.51
  5. Step 5: Solve for x
    x = 483,769,998.51/28,115.40
  6. Step 6: Final answer
    x = 17,206.58

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.