Home / 21,178.82-31,777.06-9,326.54

Finding the Fourth Proportional to 21,178.82, 31,777.06 and 9,326.54

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Solution

The fourth proportional to 21,178.82, 31,777.06 and 9,326.54 is: 13,993.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.82 : 31,777.06 = 9,326.54 : x
  2. Step 2: Convert to fraction form
    21,178.82/31,777.06 = 9,326.54/x
  3. Step 3: Cross multiply
    21,178.82x = 31,777.06 × 9,326.54
  4. Step 4: Simplify right side
    21,178.82x = 296,370,021.17
  5. Step 5: Solve for x
    x = 296,370,021.17/21,178.82
  6. Step 6: Final answer
    x = 13,993.70

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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.