Home / 21,200.90-31,799.84-6,409.88

Finding the Fourth Proportional to 21,200.90, 31,799.84 and 6,409.88

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Solution

The fourth proportional to 21,200.90, 31,799.84 and 6,409.88 is: 9,614.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,200.90 : 31,799.84 = 6,409.88 : x
  2. Step 2: Convert to fraction form
    21,200.90/31,799.84 = 6,409.88/x
  3. Step 3: Cross multiply
    21,200.90x = 31,799.84 × 6,409.88
  4. Step 4: Simplify right side
    21,200.90x = 203,833,158.42
  5. Step 5: Solve for x
    x = 203,833,158.42/21,200.90
  6. Step 6: Final answer
    x = 9,614.36

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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.