Home / 20,834.14-31,362.78-18,690.88

Finding the Fourth Proportional to 20,834.14, 31,362.78 and 18,690.88

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Solution

The fourth proportional to 20,834.14, 31,362.78 and 18,690.88 is: 28,136.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,834.14 : 31,362.78 = 18,690.88 : x
  2. Step 2: Convert to fraction form
    20,834.14/31,362.78 = 18,690.88/x
  3. Step 3: Cross multiply
    20,834.14x = 31,362.78 × 18,690.88
  4. Step 4: Simplify right side
    20,834.14x = 586,197,824.00
  5. Step 5: Solve for x
    x = 586,197,824.00/20,834.14
  6. Step 6: Final answer
    x = 28,136.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.