Home / 21,179.21-31,791.79-15,929.19

Finding the Fourth Proportional to 21,179.21, 31,791.79 and 15,929.19

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Solution

The fourth proportional to 21,179.21, 31,791.79 and 15,929.19 is: 23,911.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.21 : 31,791.79 = 15,929.19 : x
  2. Step 2: Convert to fraction form
    21,179.21/31,791.79 = 15,929.19/x
  3. Step 3: Cross multiply
    21,179.21x = 31,791.79 × 15,929.19
  4. Step 4: Simplify right side
    21,179.21x = 506,417,483.26
  5. Step 5: Solve for x
    x = 506,417,483.26/21,179.21
  6. Step 6: Final answer
    x = 23,911.07

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1.5x scale

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.