Home / 21,405.80-29,539.14-12,453.56

Finding the Fourth Proportional to 21,405.80, 29,539.14 and 12,453.56

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Solution

The fourth proportional to 21,405.80, 29,539.14 and 12,453.56 is: 17,185.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.80 : 29,539.14 = 12,453.56 : x
  2. Step 2: Convert to fraction form
    21,405.80/29,539.14 = 12,453.56/x
  3. Step 3: Cross multiply
    21,405.80x = 29,539.14 × 12,453.56
  4. Step 4: Simplify right side
    21,405.80x = 367,867,452.34
  5. Step 5: Solve for x
    x = 367,867,452.34/21,405.80
  6. Step 6: Final answer
    x = 17,185.41

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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.