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Finding the Fourth Proportional to 18,813.66, 25,962.75 and 10,316.16

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Solution

The fourth proportional to 18,813.66, 25,962.75 and 10,316.16 is: 14,236.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.66 : 25,962.75 = 10,316.16 : x
  2. Step 2: Convert to fraction form
    18,813.66/25,962.75 = 10,316.16/x
  3. Step 3: Cross multiply
    18,813.66x = 25,962.75 × 10,316.16
  4. Step 4: Simplify right side
    18,813.66x = 267,835,883.04
  5. Step 5: Solve for x
    x = 267,835,883.04/18,813.66
  6. Step 6: Final answer
    x = 14,236.25

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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.