Home / 21,256.88-31,871.65-10,163.32

Finding the Fourth Proportional to 21,256.88, 31,871.65 and 10,163.32

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Solution

The fourth proportional to 21,256.88, 31,871.65 and 10,163.32 is: 15,238.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,256.88 : 31,871.65 = 10,163.32 : x
  2. Step 2: Convert to fraction form
    21,256.88/31,871.65 = 10,163.32/x
  3. Step 3: Cross multiply
    21,256.88x = 31,871.65 × 10,163.32
  4. Step 4: Simplify right side
    21,256.88x = 323,921,777.88
  5. Step 5: Solve for x
    x = 323,921,777.88/21,256.88
  6. Step 6: Final answer
    x = 15,238.44

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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.