Home / 38,916-58,379.76-18,128.16

Finding the Fourth Proportional to 38,916, 58,379.76 and 18,128.16

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Solution

The fourth proportional to 38,916, 58,379.76 and 18,128.16 is: 27,194.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,916 : 58,379.76 = 18,128.16 : x
  2. Step 2: Convert to fraction form
    38,916/58,379.76 = 18,128.16/x
  3. Step 3: Cross multiply
    38,916x = 58,379.76 × 18,128.16
  4. Step 4: Simplify right side
    38,916x = 1,058,317,630.04
  5. Step 5: Solve for x
    x = 1,058,317,630.04/38,916
  6. Step 6: Final answer
    x = 27,194.92

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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.