Home / 21,341.78-29,454.45-11,912.30

Finding the Fourth Proportional to 21,341.78, 29,454.45 and 11,912.30

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Solution

The fourth proportional to 21,341.78, 29,454.45 and 11,912.30 is: 16,440.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,341.78 : 29,454.45 = 11,912.30 : x
  2. Step 2: Convert to fraction form
    21,341.78/29,454.45 = 11,912.30/x
  3. Step 3: Cross multiply
    21,341.78x = 29,454.45 × 11,912.30
  4. Step 4: Simplify right side
    21,341.78x = 350,870,318.37
  5. Step 5: Solve for x
    x = 350,870,318.37/21,341.78
  6. Step 6: Final answer
    x = 16,440.53

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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.