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Finding the Fourth Proportional to 18,925.88, 25,928.57 and 18,216.47

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Solution

The fourth proportional to 18,925.88, 25,928.57 and 18,216.47 is: 24,956.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,925.88 : 25,928.57 = 18,216.47 : x
  2. Step 2: Convert to fraction form
    18,925.88/25,928.57 = 18,216.47/x
  3. Step 3: Cross multiply
    18,925.88x = 25,928.57 × 18,216.47
  4. Step 4: Simplify right side
    18,925.88x = 472,326,796.82
  5. Step 5: Solve for x
    x = 472,326,796.82/18,925.88
  6. Step 6: Final answer
    x = 24,956.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.