Home / 20,909.90-31,365.04-5,327.52

Finding the Fourth Proportional to 20,909.90, 31,365.04 and 5,327.52

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Solution

The fourth proportional to 20,909.90, 31,365.04 and 5,327.52 is: 7,991.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.90 : 31,365.04 = 5,327.52 : x
  2. Step 2: Convert to fraction form
    20,909.90/31,365.04 = 5,327.52/x
  3. Step 3: Cross multiply
    20,909.90x = 31,365.04 × 5,327.52
  4. Step 4: Simplify right side
    20,909.90x = 167,097,877.90
  5. Step 5: Solve for x
    x = 167,097,877.90/20,909.90
  6. Step 6: Final answer
    x = 7,991.33

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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.