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Finding the Fourth Proportional to 18,368.08, 25,348.08 and 9,984.60

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Solution

The fourth proportional to 18,368.08, 25,348.08 and 9,984.60 is: 13,778.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,368.08 : 25,348.08 = 9,984.60 : x
  2. Step 2: Convert to fraction form
    18,368.08/25,348.08 = 9,984.60/x
  3. Step 3: Cross multiply
    18,368.08x = 25,348.08 × 9,984.60
  4. Step 4: Simplify right side
    18,368.08x = 253,090,439.57
  5. Step 5: Solve for x
    x = 253,090,439.57/18,368.08
  6. Step 6: Final answer
    x = 13,778.82

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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.