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Finding the Fourth Proportional to 18,403.94, 25,403.17 and 10,451.46

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Solution

The fourth proportional to 18,403.94, 25,403.17 and 10,451.46 is: 14,426.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,403.94 : 25,403.17 = 10,451.46 : x
  2. Step 2: Convert to fraction form
    18,403.94/25,403.17 = 10,451.46/x
  3. Step 3: Cross multiply
    18,403.94x = 25,403.17 × 10,451.46
  4. Step 4: Simplify right side
    18,403.94x = 265,500,215.13
  5. Step 5: Solve for x
    x = 265,500,215.13/18,403.94
  6. Step 6: Final answer
    x = 14,426.27

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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.