Home / 21,405.48-29,539.68-12,453.24

Finding the Fourth Proportional to 21,405.48, 29,539.68 and 12,453.24

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Solution

The fourth proportional to 21,405.48, 29,539.68 and 12,453.24 is: 17,185.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.48 : 29,539.68 = 12,453.24 : x
  2. Step 2: Convert to fraction form
    21,405.48/29,539.68 = 12,453.24/x
  3. Step 3: Cross multiply
    21,405.48x = 29,539.68 × 12,453.24
  4. Step 4: Simplify right side
    21,405.48x = 367,864,724.56
  5. Step 5: Solve for x
    x = 367,864,724.56/21,405.48
  6. Step 6: Final answer
    x = 17,185.54

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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.