Home / 21,125.88-29,150.64-12,172.68

Finding the Fourth Proportional to 21,125.88, 29,150.64 and 12,172.68

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Solution

The fourth proportional to 21,125.88, 29,150.64 and 12,172.68 is: 16,796.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.88 : 29,150.64 = 12,172.68 : x
  2. Step 2: Convert to fraction form
    21,125.88/29,150.64 = 12,172.68/x
  3. Step 3: Cross multiply
    21,125.88x = 29,150.64 × 12,172.68
  4. Step 4: Simplify right side
    21,125.88x = 354,841,412.52
  5. Step 5: Solve for x
    x = 354,841,412.52/21,125.88
  6. Step 6: Final answer
    x = 16,796.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.