Home / 21,135.53-29,166.75-11,575.31

Finding the Fourth Proportional to 21,135.53, 29,166.75 and 11,575.31

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Solution

The fourth proportional to 21,135.53, 29,166.75 and 11,575.31 is: 15,973.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.53 : 29,166.75 = 11,575.31 : x
  2. Step 2: Convert to fraction form
    21,135.53/29,166.75 = 11,575.31/x
  3. Step 3: Cross multiply
    21,135.53x = 29,166.75 × 11,575.31
  4. Step 4: Simplify right side
    21,135.53x = 337,614,172.94
  5. Step 5: Solve for x
    x = 337,614,172.94/21,135.53
  6. Step 6: Final answer
    x = 15,973.77

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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.