Home / 21,214.04-31,772.60-10,128.52

Finding the Fourth Proportional to 21,214.04, 31,772.60 and 10,128.52

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Solution

The fourth proportional to 21,214.04, 31,772.60 and 10,128.52 is: 15,169.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,214.04 : 31,772.60 = 10,128.52 : x
  2. Step 2: Convert to fraction form
    21,214.04/31,772.60 = 10,128.52/x
  3. Step 3: Cross multiply
    21,214.04x = 31,772.60 × 10,128.52
  4. Step 4: Simplify right side
    21,214.04x = 321,809,414.55
  5. Step 5: Solve for x
    x = 321,809,414.55/21,214.04
  6. Step 6: Final answer
    x = 15,169.64

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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.