Home / 39,678-59,531.99-20,957.28

Finding the Fourth Proportional to 39,678, 59,531.99 and 20,957.28

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Solution

The fourth proportional to 39,678, 59,531.99 and 20,957.28 is: 31,443.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,678 : 59,531.99 = 20,957.28 : x
  2. Step 2: Convert to fraction form
    39,678/59,531.99 = 20,957.28/x
  3. Step 3: Cross multiply
    39,678x = 59,531.99 × 20,957.28
  4. Step 4: Simplify right side
    39,678x = 1,247,628,478.60
  5. Step 5: Solve for x
    x = 1,247,628,478.60/39,678
  6. Step 6: Final answer
    x = 31,443.83

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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.