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Finding the Fourth Proportional to 13,708.71, 18,918.16 and 8,043.56

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Solution

The fourth proportional to 13,708.71, 18,918.16 and 8,043.56 is: 11,100.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.71 : 18,918.16 = 8,043.56 : x
  2. Step 2: Convert to fraction form
    13,708.71/18,918.16 = 8,043.56/x
  3. Step 3: Cross multiply
    13,708.71x = 18,918.16 × 8,043.56
  4. Step 4: Simplify right side
    13,708.71x = 152,169,311.29
  5. Step 5: Solve for x
    x = 152,169,311.29/13,708.71
  6. Step 6: Final answer
    x = 11,100.19

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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.