Home / 21,129.06-29,150.94-12,176.28

Finding the Fourth Proportional to 21,129.06, 29,150.94 and 12,176.28

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Solution

The fourth proportional to 21,129.06, 29,150.94 and 12,176.28 is: 16,799.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.06 : 29,150.94 = 12,176.28 : x
  2. Step 2: Convert to fraction form
    21,129.06/29,150.94 = 12,176.28/x
  3. Step 3: Cross multiply
    21,129.06x = 29,150.94 × 12,176.28
  4. Step 4: Simplify right side
    21,129.06x = 354,950,007.70
  5. Step 5: Solve for x
    x = 354,950,007.70/21,129.06
  6. Step 6: Final answer
    x = 16,799.14

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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.