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Finding the Fourth Proportional to 13,159.64, 18,163.96 and 8,124.68

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Solution

The fourth proportional to 13,159.64, 18,163.96 and 8,124.68 is: 11,214.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,159.64 : 18,163.96 = 8,124.68 : x
  2. Step 2: Convert to fraction form
    13,159.64/18,163.96 = 8,124.68/x
  3. Step 3: Cross multiply
    13,159.64x = 18,163.96 × 8,124.68
  4. Step 4: Simplify right side
    13,159.64x = 147,576,251.40
  5. Step 5: Solve for x
    x = 147,576,251.40/13,159.64
  6. Step 6: Final answer
    x = 11,214.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.