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Finding the Fourth Proportional to 18,461.93, 25,478.04 and 10,505.30

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Solution

The fourth proportional to 18,461.93, 25,478.04 and 10,505.30 is: 14,497.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,461.93 : 25,478.04 = 10,505.30 : x
  2. Step 2: Convert to fraction form
    18,461.93/25,478.04 = 10,505.30/x
  3. Step 3: Cross multiply
    18,461.93x = 25,478.04 × 10,505.30
  4. Step 4: Simplify right side
    18,461.93x = 267,654,453.61
  5. Step 5: Solve for x
    x = 267,654,453.61/18,461.93
  6. Step 6: Final answer
    x = 14,497.64

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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.