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Finding the Fourth Proportional to 11,163.81, 16,745.71 and 8,700.47

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Solution

The fourth proportional to 11,163.81, 16,745.71 and 8,700.47 is: 13,050.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,163.81 : 16,745.71 = 8,700.47 : x
  2. Step 2: Convert to fraction form
    11,163.81/16,745.71 = 8,700.47/x
  3. Step 3: Cross multiply
    11,163.81x = 16,745.71 × 8,700.47
  4. Step 4: Simplify right side
    11,163.81x = 145,695,547.48
  5. Step 5: Solve for x
    x = 145,695,547.48/11,163.81
  6. Step 6: Final answer
    x = 13,050.70

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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.