Home / 21,190.30-31,785.69-6,399.34

Finding the Fourth Proportional to 21,190.30, 31,785.69 and 6,399.34

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Solution

The fourth proportional to 21,190.30, 31,785.69 and 6,399.34 is: 9,599.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.30 : 31,785.69 = 6,399.34 : x
  2. Step 2: Convert to fraction form
    21,190.30/31,785.69 = 6,399.34/x
  3. Step 3: Cross multiply
    21,190.30x = 31,785.69 × 6,399.34
  4. Step 4: Simplify right side
    21,190.30x = 203,407,437.44
  5. Step 5: Solve for x
    x = 203,407,437.44/21,190.30
  6. Step 6: Final answer
    x = 9,599.08

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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.