Home / 28,857.51-39,816.49-19,902.15

Finding the Fourth Proportional to 28,857.51, 39,816.49 and 19,902.15

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Solution

The fourth proportional to 28,857.51, 39,816.49 and 19,902.15 is: 27,460.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,857.51 : 39,816.49 = 19,902.15 : x
  2. Step 2: Convert to fraction form
    28,857.51/39,816.49 = 19,902.15/x
  3. Step 3: Cross multiply
    28,857.51x = 39,816.49 × 19,902.15
  4. Step 4: Simplify right side
    28,857.51x = 792,433,756.45
  5. Step 5: Solve for x
    x = 792,433,756.45/28,857.51
  6. Step 6: Final answer
    x = 27,460.23

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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.