Home / 21,329.42-31,999.80-7,289.42

Finding the Fourth Proportional to 21,329.42, 31,999.80 and 7,289.42

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Solution

The fourth proportional to 21,329.42, 31,999.80 and 7,289.42 is: 10,936.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,329.42 : 31,999.80 = 7,289.42 : x
  2. Step 2: Convert to fraction form
    21,329.42/31,999.80 = 7,289.42/x
  3. Step 3: Cross multiply
    21,329.42x = 31,999.80 × 7,289.42
  4. Step 4: Simplify right side
    21,329.42x = 233,259,982.12
  5. Step 5: Solve for x
    x = 233,259,982.12/21,329.42
  6. Step 6: Final answer
    x = 10,936.07

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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.