Home / 20,990.36-31,485.52-14,396.56

Finding the Fourth Proportional to 20,990.36, 31,485.52 and 14,396.56

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Solution

The fourth proportional to 20,990.36, 31,485.52 and 14,396.56 is: 21,594.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.36 : 31,485.52 = 14,396.56 : x
  2. Step 2: Convert to fraction form
    20,990.36/31,485.52 = 14,396.56/x
  3. Step 3: Cross multiply
    20,990.36x = 31,485.52 × 14,396.56
  4. Step 4: Simplify right side
    20,990.36x = 453,283,177.81
  5. Step 5: Solve for x
    x = 453,283,177.81/20,990.36
  6. Step 6: Final answer
    x = 21,594.83

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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.