Home / 28,404.12-39,268.54-21,318.24

Finding the Fourth Proportional to 28,404.12, 39,268.54 and 21,318.24

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Solution

The fourth proportional to 28,404.12, 39,268.54 and 21,318.24 is: 29,472.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,404.12 : 39,268.54 = 21,318.24 : x
  2. Step 2: Convert to fraction form
    28,404.12/39,268.54 = 21,318.24/x
  3. Step 3: Cross multiply
    28,404.12x = 39,268.54 × 21,318.24
  4. Step 4: Simplify right side
    28,404.12x = 837,135,910.53
  5. Step 5: Solve for x
    x = 837,135,910.53/28,404.12
  6. Step 6: Final answer
    x = 29,472.35

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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.