Home / 28,354.80-39,183.60-21,268.92

Finding the Fourth Proportional to 28,354.80, 39,183.60 and 21,268.92

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Solution

The fourth proportional to 28,354.80, 39,183.60 and 21,268.92 is: 29,391.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,354.80 : 39,183.60 = 21,268.92 : x
  2. Step 2: Convert to fraction form
    28,354.80/39,183.60 = 21,268.92/x
  3. Step 3: Cross multiply
    28,354.80x = 39,183.60 × 21,268.92
  4. Step 4: Simplify right side
    28,354.80x = 833,392,853.71
  5. Step 5: Solve for x
    x = 833,392,853.71/28,354.80
  6. Step 6: Final answer
    x = 29,391.60

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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.