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Finding the Fourth Proportional to 12,646.86, 18,945.63 and 7,704.24

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Solution

The fourth proportional to 12,646.86, 18,945.63 and 7,704.24 is: 11,541.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,646.86 : 18,945.63 = 7,704.24 : x
  2. Step 2: Convert to fraction form
    12,646.86/18,945.63 = 7,704.24/x
  3. Step 3: Cross multiply
    12,646.86x = 18,945.63 × 7,704.24
  4. Step 4: Simplify right side
    12,646.86x = 145,961,680.47
  5. Step 5: Solve for x
    x = 145,961,680.47/12,646.86
  6. Step 6: Final answer
    x = 11,541.34

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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.