Home / 28,512-39,346.56-15,939.36

Finding the Fourth Proportional to 28,512, 39,346.56 and 15,939.36

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Solution

The fourth proportional to 28,512, 39,346.56 and 15,939.36 is: 21,996.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512 : 39,346.56 = 15,939.36 : x
  2. Step 2: Convert to fraction form
    28,512/39,346.56 = 15,939.36/x
  3. Step 3: Cross multiply
    28,512x = 39,346.56 × 15,939.36
  4. Step 4: Simplify right side
    28,512x = 627,158,984.60
  5. Step 5: Solve for x
    x = 627,158,984.60/28,512
  6. Step 6: Final answer
    x = 21,996.32

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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.