Home / 21,260.39-31,889.85-11,418.89

Finding the Fourth Proportional to 21,260.39, 31,889.85 and 11,418.89

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Solution

The fourth proportional to 21,260.39, 31,889.85 and 11,418.89 is: 17,127.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,260.39 : 31,889.85 = 11,418.89 : x
  2. Step 2: Convert to fraction form
    21,260.39/31,889.85 = 11,418.89/x
  3. Step 3: Cross multiply
    21,260.39x = 31,889.85 × 11,418.89
  4. Step 4: Simplify right side
    21,260.39x = 364,146,529.82
  5. Step 5: Solve for x
    x = 364,146,529.82/21,260.39
  6. Step 6: Final answer
    x = 17,127.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.