Home / 28,318.69-39,081.72-18,742.06

Finding the Fourth Proportional to 28,318.69, 39,081.72 and 18,742.06

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Solution

The fourth proportional to 28,318.69, 39,081.72 and 18,742.06 is: 25,865.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.69 : 39,081.72 = 18,742.06 : x
  2. Step 2: Convert to fraction form
    28,318.69/39,081.72 = 18,742.06/x
  3. Step 3: Cross multiply
    28,318.69x = 39,081.72 × 18,742.06
  4. Step 4: Simplify right side
    28,318.69x = 732,471,941.14
  5. Step 5: Solve for x
    x = 732,471,941.14/28,318.69
  6. Step 6: Final answer
    x = 25,865.32

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Why These Related Problems?

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