Home / 21,429.36-32,144.40-20,272.68

Finding the Fourth Proportional to 21,429.36, 32,144.40 and 20,272.68

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Solution

The fourth proportional to 21,429.36, 32,144.40 and 20,272.68 is: 30,409.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,429.36 : 32,144.40 = 20,272.68 : x
  2. Step 2: Convert to fraction form
    21,429.36/32,144.40 = 20,272.68/x
  3. Step 3: Cross multiply
    21,429.36x = 32,144.40 × 20,272.68
  4. Step 4: Simplify right side
    21,429.36x = 651,653,134.99
  5. Step 5: Solve for x
    x = 651,653,134.99/21,429.36
  6. Step 6: Final answer
    x = 30,409.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.