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Finding the Fourth Proportional to 12,656.79, 18,983.77 and 4,860.14

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Solution

The fourth proportional to 12,656.79, 18,983.77 and 4,860.14 is: 7,289.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,656.79 : 18,983.77 = 4,860.14 : x
  2. Step 2: Convert to fraction form
    12,656.79/18,983.77 = 4,860.14/x
  3. Step 3: Cross multiply
    12,656.79x = 18,983.77 × 4,860.14
  4. Step 4: Simplify right side
    12,656.79x = 92,263,672.86
  5. Step 5: Solve for x
    x = 92,263,672.86/12,656.79
  6. Step 6: Final answer
    x = 7,289.66

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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.