Home / 28,571.20-39,390.78-19,603.15

Finding the Fourth Proportional to 28,571.20, 39,390.78 and 19,603.15

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Solution

The fourth proportional to 28,571.20, 39,390.78 and 19,603.15 is: 27,026.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,571.20 : 39,390.78 = 19,603.15 : x
  2. Step 2: Convert to fraction form
    28,571.20/39,390.78 = 19,603.15/x
  3. Step 3: Cross multiply
    28,571.20x = 39,390.78 × 19,603.15
  4. Step 4: Simplify right side
    28,571.20x = 772,183,368.96
  5. Step 5: Solve for x
    x = 772,183,368.96/28,571.20
  6. Step 6: Final answer
    x = 27,026.63

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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.