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Finding the Fourth Proportional to 18,697.16, 25,824.40 and 13,653.30

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Solution

The fourth proportional to 18,697.16, 25,824.40 and 13,653.30 is: 18,857.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.16 : 25,824.40 = 13,653.30 : x
  2. Step 2: Convert to fraction form
    18,697.16/25,824.40 = 13,653.30/x
  3. Step 3: Cross multiply
    18,697.16x = 25,824.40 × 13,653.30
  4. Step 4: Simplify right side
    18,697.16x = 352,588,280.52
  5. Step 5: Solve for x
    x = 352,588,280.52/18,697.16
  6. Step 6: Final answer
    x = 18,857.85

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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.