Home / 21,239.28-31,858.96-5,656.88

Finding the Fourth Proportional to 21,239.28, 31,858.96 and 5,656.88

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Solution

The fourth proportional to 21,239.28, 31,858.96 and 5,656.88 is: 8,485.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.28 : 31,858.96 = 5,656.88 : x
  2. Step 2: Convert to fraction form
    21,239.28/31,858.96 = 5,656.88/x
  3. Step 3: Cross multiply
    21,239.28x = 31,858.96 × 5,656.88
  4. Step 4: Simplify right side
    21,239.28x = 180,222,313.64
  5. Step 5: Solve for x
    x = 180,222,313.64/21,239.28
  6. Step 6: Final answer
    x = 8,485.33

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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.