Home / 21,143.68-29,161.38-14,436.88

Finding the Fourth Proportional to 21,143.68, 29,161.38 and 14,436.88

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Solution

The fourth proportional to 21,143.68, 29,161.38 and 14,436.88 is: 19,911.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.68 : 29,161.38 = 14,436.88 : x
  2. Step 2: Convert to fraction form
    21,143.68/29,161.38 = 14,436.88/x
  3. Step 3: Cross multiply
    21,143.68x = 29,161.38 × 14,436.88
  4. Step 4: Simplify right side
    21,143.68x = 420,999,343.69
  5. Step 5: Solve for x
    x = 420,999,343.69/21,143.68
  6. Step 6: Final answer
    x = 19,911.36

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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.