Home / 21,181.54-31,772.54-6,390.59

Finding the Fourth Proportional to 21,181.54, 31,772.54 and 6,390.59

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Solution

The fourth proportional to 21,181.54, 31,772.54 and 6,390.59 is: 9,585.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.54 : 31,772.54 = 6,390.59 : x
  2. Step 2: Convert to fraction form
    21,181.54/31,772.54 = 6,390.59/x
  3. Step 3: Cross multiply
    21,181.54x = 31,772.54 × 6,390.59
  4. Step 4: Simplify right side
    21,181.54x = 203,045,276.40
  5. Step 5: Solve for x
    x = 203,045,276.40/21,181.54
  6. Step 6: Final answer
    x = 9,585.95

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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.