Home / 21,983.40-30,337.05-11,912.12

Finding the Fourth Proportional to 21,983.40, 30,337.05 and 11,912.12

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Solution

The fourth proportional to 21,983.40, 30,337.05 and 11,912.12 is: 16,438.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,983.40 : 30,337.05 = 11,912.12 : x
  2. Step 2: Convert to fraction form
    21,983.40/30,337.05 = 11,912.12/x
  3. Step 3: Cross multiply
    21,983.40x = 30,337.05 × 11,912.12
  4. Step 4: Simplify right side
    21,983.40x = 361,378,368.80
  5. Step 5: Solve for x
    x = 361,378,368.80/21,983.40
  6. Step 6: Final answer
    x = 16,438.69

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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.