Home / 21,189.30-31,784.19-6,398.34

Finding the Fourth Proportional to 21,189.30, 31,784.19 and 6,398.34

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Solution

The fourth proportional to 21,189.30, 31,784.19 and 6,398.34 is: 9,597.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.30 : 31,784.19 = 6,398.34 : x
  2. Step 2: Convert to fraction form
    21,189.30/31,784.19 = 6,398.34/x
  3. Step 3: Cross multiply
    21,189.30x = 31,784.19 × 6,398.34
  4. Step 4: Simplify right side
    21,189.30x = 203,366,054.24
  5. Step 5: Solve for x
    x = 203,366,054.24/21,189.30
  6. Step 6: Final answer
    x = 9,597.58

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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.