Home / 28,578.96-39,451.38-21,507.12

Finding the Fourth Proportional to 28,578.96, 39,451.38 and 21,507.12

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Solution

The fourth proportional to 28,578.96, 39,451.38 and 21,507.12 is: 29,689.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,578.96 : 39,451.38 = 21,507.12 : x
  2. Step 2: Convert to fraction form
    28,578.96/39,451.38 = 21,507.12/x
  3. Step 3: Cross multiply
    28,578.96x = 39,451.38 × 21,507.12
  4. Step 4: Simplify right side
    28,578.96x = 848,485,563.83
  5. Step 5: Solve for x
    x = 848,485,563.83/28,578.96
  6. Step 6: Final answer
    x = 29,689.17

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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.