Home / 25,682.70-35,427.96-20,907.78

Finding the Fourth Proportional to 25,682.70, 35,427.96 and 20,907.78

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Solution

The fourth proportional to 25,682.70, 35,427.96 and 20,907.78 is: 28,841.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,682.70 : 35,427.96 = 20,907.78 : x
  2. Step 2: Convert to fraction form
    25,682.70/35,427.96 = 20,907.78/x
  3. Step 3: Cross multiply
    25,682.70x = 35,427.96 × 20,907.78
  4. Step 4: Simplify right side
    25,682.70x = 740,719,993.53
  5. Step 5: Solve for x
    x = 740,719,993.53/25,682.70
  6. Step 6: Final answer
    x = 28,841.20

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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.