Home / 28,776.16-39,708.24-21,226.57

Finding the Fourth Proportional to 28,776.16, 39,708.24 and 21,226.57

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Solution

The fourth proportional to 28,776.16, 39,708.24 and 21,226.57 is: 29,290.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,776.16 : 39,708.24 = 21,226.57 : x
  2. Step 2: Convert to fraction form
    28,776.16/39,708.24 = 21,226.57/x
  3. Step 3: Cross multiply
    28,776.16x = 39,708.24 × 21,226.57
  4. Step 4: Simplify right side
    28,776.16x = 842,869,735.94
  5. Step 5: Solve for x
    x = 842,869,735.94/28,776.16
  6. Step 6: Final answer
    x = 29,290.56

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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.