Home / 28,986.88-39,998.08-18,357.76

Finding the Fourth Proportional to 28,986.88, 39,998.08 and 18,357.76

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Solution

The fourth proportional to 28,986.88, 39,998.08 and 18,357.76 is: 25,331.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,986.88 : 39,998.08 = 18,357.76 : x
  2. Step 2: Convert to fraction form
    28,986.88/39,998.08 = 18,357.76/x
  3. Step 3: Cross multiply
    28,986.88x = 39,998.08 × 18,357.76
  4. Step 4: Simplify right side
    28,986.88x = 734,275,153.10
  5. Step 5: Solve for x
    x = 734,275,153.10/28,986.88
  6. Step 6: Final answer
    x = 25,331.29

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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.