Home / 28,628.62-39,465.96-20,104.78

Finding the Fourth Proportional to 28,628.62, 39,465.96 and 20,104.78

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Solution

The fourth proportional to 28,628.62, 39,465.96 and 20,104.78 is: 27,715.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,628.62 : 39,465.96 = 20,104.78 : x
  2. Step 2: Convert to fraction form
    28,628.62/39,465.96 = 20,104.78/x
  3. Step 3: Cross multiply
    28,628.62x = 39,465.96 × 20,104.78
  4. Step 4: Simplify right side
    28,628.62x = 793,454,443.29
  5. Step 5: Solve for x
    x = 793,454,443.29/28,628.62
  6. Step 6: Final answer
    x = 27,715.43

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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.