Home / 20,999.40-31,500.72-6,208.02

Finding the Fourth Proportional to 20,999.40, 31,500.72 and 6,208.02

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Solution

The fourth proportional to 20,999.40, 31,500.72 and 6,208.02 is: 9,312.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.40 : 31,500.72 = 6,208.02 : x
  2. Step 2: Convert to fraction form
    20,999.40/31,500.72 = 6,208.02/x
  3. Step 3: Cross multiply
    20,999.40x = 31,500.72 × 6,208.02
  4. Step 4: Simplify right side
    20,999.40x = 195,557,099.77
  5. Step 5: Solve for x
    x = 195,557,099.77/20,999.40
  6. Step 6: Final answer
    x = 9,312.51

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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.