Home / 21,739.92-29,971.80-14,171.28

Finding the Fourth Proportional to 21,739.92, 29,971.80 and 14,171.28

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Solution

The fourth proportional to 21,739.92, 29,971.80 and 14,171.28 is: 19,537.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,739.92 : 29,971.80 = 14,171.28 : x
  2. Step 2: Convert to fraction form
    21,739.92/29,971.80 = 14,171.28/x
  3. Step 3: Cross multiply
    21,739.92x = 29,971.80 × 14,171.28
  4. Step 4: Simplify right side
    21,739.92x = 424,738,769.90
  5. Step 5: Solve for x
    x = 424,738,769.90/21,739.92
  6. Step 6: Final answer
    x = 19,537.27

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1.5x scale

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.