Home / 13,708.56-20,564.79-4,221.68

Finding the Fourth Proportional to 13,708.56, 20,564.79 and 4,221.68

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Solution

The fourth proportional to 13,708.56, 20,564.79 and 4,221.68 is: 6,333.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.56 : 20,564.79 = 4,221.68 : x
  2. Step 2: Convert to fraction form
    13,708.56/20,564.79 = 4,221.68/x
  3. Step 3: Cross multiply
    13,708.56x = 20,564.79 × 4,221.68
  4. Step 4: Simplify right side
    13,708.56x = 86,817,859.82
  5. Step 5: Solve for x
    x = 86,817,859.82/13,708.56
  6. Step 6: Final answer
    x = 6,333.12

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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.