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Finding the Fourth Proportional to 18,422.76, 25,423.32 and 10,039.24

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Solution

The fourth proportional to 18,422.76, 25,423.32 and 10,039.24 is: 13,854.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,422.76 : 25,423.32 = 10,039.24 : x
  2. Step 2: Convert to fraction form
    18,422.76/25,423.32 = 10,039.24/x
  3. Step 3: Cross multiply
    18,422.76x = 25,423.32 × 10,039.24
  4. Step 4: Simplify right side
    18,422.76x = 255,230,811.08
  5. Step 5: Solve for x
    x = 255,230,811.08/18,422.76
  6. Step 6: Final answer
    x = 13,854.10

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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.