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Finding the Fourth Proportional to 18,458.64, 27,638.64 and 9,675.12

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Solution

The fourth proportional to 18,458.64, 27,638.64 and 9,675.12 is: 14,486.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,458.64 : 27,638.64 = 9,675.12 : x
  2. Step 2: Convert to fraction form
    18,458.64/27,638.64 = 9,675.12/x
  3. Step 3: Cross multiply
    18,458.64x = 27,638.64 × 9,675.12
  4. Step 4: Simplify right side
    18,458.64x = 267,407,158.64
  5. Step 5: Solve for x
    x = 267,407,158.64/18,458.64
  6. Step 6: Final answer
    x = 14,486.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.