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Finding the Fourth Proportional to 18,461.84, 25,477.92 and 10,078.34

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Solution

The fourth proportional to 18,461.84, 25,477.92 and 10,078.34 is: 13,908.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,461.84 : 25,477.92 = 10,078.34 : x
  2. Step 2: Convert to fraction form
    18,461.84/25,477.92 = 10,078.34/x
  3. Step 3: Cross multiply
    18,461.84x = 25,477.92 × 10,078.34
  4. Step 4: Simplify right side
    18,461.84x = 256,775,012.86
  5. Step 5: Solve for x
    x = 256,775,012.86/18,461.84
  6. Step 6: Final answer
    x = 13,908.42

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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.