Home / 21,770.73-30,046.89-13,277.78

Finding the Fourth Proportional to 21,770.73, 30,046.89 and 13,277.78

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Solution

The fourth proportional to 21,770.73, 30,046.89 and 13,277.78 is: 18,325.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,770.73 : 30,046.89 = 13,277.78 : x
  2. Step 2: Convert to fraction form
    21,770.73/30,046.89 = 13,277.78/x
  3. Step 3: Cross multiply
    21,770.73x = 30,046.89 × 13,277.78
  4. Step 4: Simplify right side
    21,770.73x = 398,955,995.10
  5. Step 5: Solve for x
    x = 398,955,995.10/21,770.73
  6. Step 6: Final answer
    x = 18,325.34

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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.