Home / 28,671.81-42,991.32-11,121.15

Finding the Fourth Proportional to 28,671.81, 42,991.32 and 11,121.15

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Solution

The fourth proportional to 28,671.81, 42,991.32 and 11,121.15 is: 16,675.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,671.81 : 42,991.32 = 11,121.15 : x
  2. Step 2: Convert to fraction form
    28,671.81/42,991.32 = 11,121.15/x
  3. Step 3: Cross multiply
    28,671.81x = 42,991.32 × 11,121.15
  4. Step 4: Simplify right side
    28,671.81x = 478,112,918.42
  5. Step 5: Solve for x
    x = 478,112,918.42/28,671.81
  6. Step 6: Final answer
    x = 16,675.37

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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.