Home / 28,568.10-39,383.40-21,001.08

Finding the Fourth Proportional to 28,568.10, 39,383.40 and 21,001.08

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Solution

The fourth proportional to 28,568.10, 39,383.40 and 21,001.08 is: 28,951.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,568.10 : 39,383.40 = 21,001.08 : x
  2. Step 2: Convert to fraction form
    28,568.10/39,383.40 = 21,001.08/x
  3. Step 3: Cross multiply
    28,568.10x = 39,383.40 × 21,001.08
  4. Step 4: Simplify right side
    28,568.10x = 827,093,934.07
  5. Step 5: Solve for x
    x = 827,093,934.07/28,568.10
  6. Step 6: Final answer
    x = 28,951.66

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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.