Home / 21,139.92-29,168.64-12,754.80

Finding the Fourth Proportional to 21,139.92, 29,168.64 and 12,754.80

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Solution

The fourth proportional to 21,139.92, 29,168.64 and 12,754.80 is: 17,598.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.92 : 29,168.64 = 12,754.80 : x
  2. Step 2: Convert to fraction form
    21,139.92/29,168.64 = 12,754.80/x
  3. Step 3: Cross multiply
    21,139.92x = 29,168.64 × 12,754.80
  4. Step 4: Simplify right side
    21,139.92x = 372,040,169.47
  5. Step 5: Solve for x
    x = 372,040,169.47/21,139.92
  6. Step 6: Final answer
    x = 17,598.94

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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.