Home / 21,278.73-31,858.08-11,260.79

Finding the Fourth Proportional to 21,278.73, 31,858.08 and 11,260.79

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Solution

The fourth proportional to 21,278.73, 31,858.08 and 11,260.79 is: 16,859.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.73 : 31,858.08 = 11,260.79 : x
  2. Step 2: Convert to fraction form
    21,278.73/31,858.08 = 11,260.79/x
  3. Step 3: Cross multiply
    21,278.73x = 31,858.08 × 11,260.79
  4. Step 4: Simplify right side
    21,278.73x = 358,746,989.39
  5. Step 5: Solve for x
    x = 358,746,989.39/21,278.73
  6. Step 6: Final answer
    x = 16,859.42

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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.