Home / 21,126.87-29,161.56-12,180.33

Finding the Fourth Proportional to 21,126.87, 29,161.56 and 12,180.33

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Solution

The fourth proportional to 21,126.87, 29,161.56 and 12,180.33 is: 16,812.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.87 : 29,161.56 = 12,180.33 : x
  2. Step 2: Convert to fraction form
    21,126.87/29,161.56 = 12,180.33/x
  3. Step 3: Cross multiply
    21,126.87x = 29,161.56 × 12,180.33
  4. Step 4: Simplify right side
    21,126.87x = 355,197,424.11
  5. Step 5: Solve for x
    x = 355,197,424.11/21,126.87
  6. Step 6: Final answer
    x = 16,812.59

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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.