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Finding the Fourth Proportional to 25,391.62, 35,076.94 and 20,280.42

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Solution

The fourth proportional to 25,391.62, 35,076.94 and 20,280.42 is: 28,016.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,391.62 : 35,076.94 = 20,280.42 : x
  2. Step 2: Convert to fraction form
    25,391.62/35,076.94 = 20,280.42/x
  3. Step 3: Cross multiply
    25,391.62x = 35,076.94 × 20,280.42
  4. Step 4: Simplify right side
    25,391.62x = 711,375,075.51
  5. Step 5: Solve for x
    x = 711,375,075.51/25,391.62
  6. Step 6: Final answer
    x = 28,016.14

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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.