Home / 18,876.81-28,318.86-10,121.52

Finding the Fourth Proportional to 18,876.81, 28,318.86 and 10,121.52

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Solution

The fourth proportional to 18,876.81, 28,318.86 and 10,121.52 is: 15,184.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,876.81 : 28,318.86 = 10,121.52 : x
  2. Step 2: Convert to fraction form
    18,876.81/28,318.86 = 10,121.52/x
  3. Step 3: Cross multiply
    18,876.81x = 28,318.86 × 10,121.52
  4. Step 4: Simplify right side
    18,876.81x = 286,629,907.87
  5. Step 5: Solve for x
    x = 286,629,907.87/18,876.81
  6. Step 6: Final answer
    x = 15,184.23

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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.