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Finding the Fourth Proportional to 12,405.78, 18,597.73 and 4,609.13

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Solution

The fourth proportional to 12,405.78, 18,597.73 and 4,609.13 is: 6,909.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.78 : 18,597.73 = 4,609.13 : x
  2. Step 2: Convert to fraction form
    12,405.78/18,597.73 = 4,609.13/x
  3. Step 3: Cross multiply
    12,405.78x = 18,597.73 × 4,609.13
  4. Step 4: Simplify right side
    12,405.78x = 85,719,355.27
  5. Step 5: Solve for x
    x = 85,719,355.27/12,405.78
  6. Step 6: Final answer
    x = 6,909.63

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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.