Home / 21,051.48-29,038.42-15,379.28

Finding the Fourth Proportional to 21,051.48, 29,038.42 and 15,379.28

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Solution

The fourth proportional to 21,051.48, 29,038.42 and 15,379.28 is: 21,214.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.48 : 29,038.42 = 15,379.28 : x
  2. Step 2: Convert to fraction form
    21,051.48/29,038.42 = 15,379.28/x
  3. Step 3: Cross multiply
    21,051.48x = 29,038.42 × 15,379.28
  4. Step 4: Simplify right side
    21,051.48x = 446,589,991.94
  5. Step 5: Solve for x
    x = 446,589,991.94/21,051.48
  6. Step 6: Final answer
    x = 21,214.19

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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.