Home / 28,406.96-39,272.46-21,321.08

Finding the Fourth Proportional to 28,406.96, 39,272.46 and 21,321.08

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Solution

The fourth proportional to 28,406.96, 39,272.46 and 21,321.08 is: 29,476.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,406.96 : 39,272.46 = 21,321.08 : x
  2. Step 2: Convert to fraction form
    28,406.96/39,272.46 = 21,321.08/x
  3. Step 3: Cross multiply
    28,406.96x = 39,272.46 × 21,321.08
  4. Step 4: Simplify right side
    28,406.96x = 837,331,252.34
  5. Step 5: Solve for x
    x = 837,331,252.34/28,406.96
  6. Step 6: Final answer
    x = 29,476.27

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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.