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Finding the Fourth Proportional to 25,790.80, 35,590.80 and 16,821.28

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Solution

The fourth proportional to 25,790.80, 35,590.80 and 16,821.28 is: 23,213.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,790.80 : 35,590.80 = 16,821.28 : x
  2. Step 2: Convert to fraction form
    25,790.80/35,590.80 = 16,821.28/x
  3. Step 3: Cross multiply
    25,790.80x = 35,590.80 × 16,821.28
  4. Step 4: Simplify right side
    25,790.80x = 598,682,812.22
  5. Step 5: Solve for x
    x = 598,682,812.22/25,790.80
  6. Step 6: Final answer
    x = 23,213.04

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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.