Home / 21,835.50-30,135.42-13,452

Finding the Fourth Proportional to 21,835.50, 30,135.42 and 13,452

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Solution

The fourth proportional to 21,835.50, 30,135.42 and 13,452 is: 18,565.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,835.50 : 30,135.42 = 13,452 : x
  2. Step 2: Convert to fraction form
    21,835.50/30,135.42 = 13,452/x
  3. Step 3: Cross multiply
    21,835.50x = 30,135.42 × 13,452
  4. Step 4: Simplify right side
    21,835.50x = 405,381,669.84
  5. Step 5: Solve for x
    x = 405,381,669.84/21,835.50
  6. Step 6: Final answer
    x = 18,565.26

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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.