Home / 21,212.77-31,806.08-7,171.48

Finding the Fourth Proportional to 21,212.77, 31,806.08 and 7,171.48

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Solution

The fourth proportional to 21,212.77, 31,806.08 and 7,171.48 is: 10,752.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,212.77 : 31,806.08 = 7,171.48 : x
  2. Step 2: Convert to fraction form
    21,212.77/31,806.08 = 7,171.48/x
  3. Step 3: Cross multiply
    21,212.77x = 31,806.08 × 7,171.48
  4. Step 4: Simplify right side
    21,212.77x = 228,096,666.60
  5. Step 5: Solve for x
    x = 228,096,666.60/21,212.77
  6. Step 6: Final answer
    x = 10,752.80

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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.