Home / 21,240.80-31,860.37-6,449.12

Finding the Fourth Proportional to 21,240.80, 31,860.37 and 6,449.12

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Solution

The fourth proportional to 21,240.80, 31,860.37 and 6,449.12 is: 9,673.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,240.80 : 31,860.37 = 6,449.12 : x
  2. Step 2: Convert to fraction form
    21,240.80/31,860.37 = 6,449.12/x
  3. Step 3: Cross multiply
    21,240.80x = 31,860.37 × 6,449.12
  4. Step 4: Simplify right side
    21,240.80x = 205,471,349.37
  5. Step 5: Solve for x
    x = 205,471,349.37/21,240.80
  6. Step 6: Final answer
    x = 9,673.43

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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.