Home / 20,855.27-31,283.10-5,272.89

Finding the Fourth Proportional to 20,855.27, 31,283.10 and 5,272.89

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Solution

The fourth proportional to 20,855.27, 31,283.10 and 5,272.89 is: 7,909.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.27 : 31,283.10 = 5,272.89 : x
  2. Step 2: Convert to fraction form
    20,855.27/31,283.10 = 5,272.89/x
  3. Step 3: Cross multiply
    20,855.27x = 31,283.10 × 5,272.89
  4. Step 4: Simplify right side
    20,855.27x = 164,952,345.16
  5. Step 5: Solve for x
    x = 164,952,345.16/20,855.27
  6. Step 6: Final answer
    x = 7,909.39

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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.