Home / 20,999.12-31,487.70-6,206.04

Finding the Fourth Proportional to 20,999.12, 31,487.70 and 6,206.04

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Solution

The fourth proportional to 20,999.12, 31,487.70 and 6,206.04 is: 9,305.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.12 : 31,487.70 = 6,206.04 : x
  2. Step 2: Convert to fraction form
    20,999.12/31,487.70 = 6,206.04/x
  3. Step 3: Cross multiply
    20,999.12x = 31,487.70 × 6,206.04
  4. Step 4: Simplify right side
    20,999.12x = 195,413,925.71
  5. Step 5: Solve for x
    x = 195,413,925.71/20,999.12
  6. Step 6: Final answer
    x = 9,305.81

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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.