Home / 21,125.73-31,680.09-7,970.94

Finding the Fourth Proportional to 21,125.73, 31,680.09 and 7,970.94

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Solution

The fourth proportional to 21,125.73, 31,680.09 and 7,970.94 is: 11,953.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.73 : 31,680.09 = 7,970.94 : x
  2. Step 2: Convert to fraction form
    21,125.73/31,680.09 = 7,970.94/x
  3. Step 3: Cross multiply
    21,125.73x = 31,680.09 × 7,970.94
  4. Step 4: Simplify right side
    21,125.73x = 252,520,096.58
  5. Step 5: Solve for x
    x = 252,520,096.58/21,125.73
  6. Step 6: Final answer
    x = 11,953.20

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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.