Home / 21,177.12-31,769.88-6,385.32

Finding the Fourth Proportional to 21,177.12, 31,769.88 and 6,385.32

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Solution

The fourth proportional to 21,177.12, 31,769.88 and 6,385.32 is: 9,579.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.12 : 31,769.88 = 6,385.32 : x
  2. Step 2: Convert to fraction form
    21,177.12/31,769.88 = 6,385.32/x
  3. Step 3: Cross multiply
    21,177.12x = 31,769.88 × 6,385.32
  4. Step 4: Simplify right side
    21,177.12x = 202,860,850.16
  5. Step 5: Solve for x
    x = 202,860,850.16/21,177.12
  6. Step 6: Final answer
    x = 9,579.25

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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.