Home / 21,908.98-30,236.59-13,416.64

Finding the Fourth Proportional to 21,908.98, 30,236.59 and 13,416.64

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Solution

The fourth proportional to 21,908.98, 30,236.59 and 13,416.64 is: 18,516.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,908.98 : 30,236.59 = 13,416.64 : x
  2. Step 2: Convert to fraction form
    21,908.98/30,236.59 = 13,416.64/x
  3. Step 3: Cross multiply
    21,908.98x = 30,236.59 × 13,416.64
  4. Step 4: Simplify right side
    21,908.98x = 405,673,384.04
  5. Step 5: Solve for x
    x = 405,673,384.04/21,908.98
  6. Step 6: Final answer
    x = 18,516.31

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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.