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Finding the Fourth Proportional to 21,793.40, 30,074.06 and 11,857.40

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Solution

The fourth proportional to 21,793.40, 30,074.06 and 11,857.40 is: 16,362.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,793.40 : 30,074.06 = 11,857.40 : x
  2. Step 2: Convert to fraction form
    21,793.40/30,074.06 = 11,857.40/x
  3. Step 3: Cross multiply
    21,793.40x = 30,074.06 × 11,857.40
  4. Step 4: Simplify right side
    21,793.40x = 356,600,159.04
  5. Step 5: Solve for x
    x = 356,600,159.04/21,793.40
  6. Step 6: Final answer
    x = 16,362.76

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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.