Home / 20,389.32-28,146.09-19,112.61

Finding the Fourth Proportional to 20,389.32, 28,146.09 and 19,112.61

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Solution

The fourth proportional to 20,389.32, 28,146.09 and 19,112.61 is: 26,383.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.32 : 28,146.09 = 19,112.61 : x
  2. Step 2: Convert to fraction form
    20,389.32/28,146.09 = 19,112.61/x
  3. Step 3: Cross multiply
    20,389.32x = 28,146.09 × 19,112.61
  4. Step 4: Simplify right side
    20,389.32x = 537,945,145.63
  5. Step 5: Solve for x
    x = 537,945,145.63/20,389.32
  6. Step 6: Final answer
    x = 26,383.68

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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.