Home / 21,347.48-31,971.96-20,609.36

Finding the Fourth Proportional to 21,347.48, 31,971.96 and 20,609.36

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Solution

The fourth proportional to 21,347.48, 31,971.96 and 20,609.36 is: 30,866.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,347.48 : 31,971.96 = 20,609.36 : x
  2. Step 2: Convert to fraction form
    21,347.48/31,971.96 = 20,609.36/x
  3. Step 3: Cross multiply
    21,347.48x = 31,971.96 × 20,609.36
  4. Step 4: Simplify right side
    21,347.48x = 658,921,633.55
  5. Step 5: Solve for x
    x = 658,921,633.55/21,347.48
  6. Step 6: Final answer
    x = 30,866.48

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1.5x scale

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.