Home / 20,866.80-31,299.96-5,071.92

Finding the Fourth Proportional to 20,866.80, 31,299.96 and 5,071.92

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Solution

The fourth proportional to 20,866.80, 31,299.96 and 5,071.92 is: 7,607.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.80 : 31,299.96 = 5,071.92 : x
  2. Step 2: Convert to fraction form
    20,866.80/31,299.96 = 5,071.92/x
  3. Step 3: Cross multiply
    20,866.80x = 31,299.96 × 5,071.92
  4. Step 4: Simplify right side
    20,866.80x = 158,750,893.12
  5. Step 5: Solve for x
    x = 158,750,893.12/20,866.80
  6. Step 6: Final answer
    x = 7,607.82

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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.