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Finding the Fourth Proportional to 13,564.80, 18,813.60 and 13,305.60

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Solution

The fourth proportional to 13,564.80, 18,813.60 and 13,305.60 is: 18,454.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,564.80 : 18,813.60 = 13,305.60 : x
  2. Step 2: Convert to fraction form
    13,564.80/18,813.60 = 13,305.60/x
  3. Step 3: Cross multiply
    13,564.80x = 18,813.60 × 13,305.60
  4. Step 4: Simplify right side
    13,564.80x = 250,326,236.16
  5. Step 5: Solve for x
    x = 250,326,236.16/13,564.80
  6. Step 6: Final answer
    x = 18,454.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.