Home / 21,096.45-31,638.20-9,999.86

Finding the Fourth Proportional to 21,096.45, 31,638.20 and 9,999.86

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Solution

The fourth proportional to 21,096.45, 31,638.20 and 9,999.86 is: 14,996.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,096.45 : 31,638.20 = 9,999.86 : x
  2. Step 2: Convert to fraction form
    21,096.45/31,638.20 = 9,999.86/x
  3. Step 3: Cross multiply
    21,096.45x = 31,638.20 × 9,999.86
  4. Step 4: Simplify right side
    21,096.45x = 316,377,362.46
  5. Step 5: Solve for x
    x = 316,377,362.46/21,096.45
  6. Step 6: Final answer
    x = 14,996.71

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1.5x scale

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.