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Finding the Fourth Proportional to 18,672.74, 25,762.84 and 11,113

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Solution

The fourth proportional to 18,672.74, 25,762.84 and 11,113 is: 15,332.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.74 : 25,762.84 = 11,113 : x
  2. Step 2: Convert to fraction form
    18,672.74/25,762.84 = 11,113/x
  3. Step 3: Cross multiply
    18,672.74x = 25,762.84 × 11,113
  4. Step 4: Simplify right side
    18,672.74x = 286,302,440.92
  5. Step 5: Solve for x
    x = 286,302,440.92/18,672.74
  6. Step 6: Final answer
    x = 15,332.64

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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.