Home / 20,838.28-31,260.30-6,991.24

Finding the Fourth Proportional to 20,838.28, 31,260.30 and 6,991.24

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Solution

The fourth proportional to 20,838.28, 31,260.30 and 6,991.24 is: 10,487.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.28 : 31,260.30 = 6,991.24 : x
  2. Step 2: Convert to fraction form
    20,838.28/31,260.30 = 6,991.24/x
  3. Step 3: Cross multiply
    20,838.28x = 31,260.30 × 6,991.24
  4. Step 4: Simplify right side
    20,838.28x = 218,548,259.77
  5. Step 5: Solve for x
    x = 218,548,259.77/20,838.28
  6. Step 6: Final answer
    x = 10,487.83

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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.