Home / 21,945.69-32,918.54-12,079.89

Finding the Fourth Proportional to 21,945.69, 32,918.54 and 12,079.89

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Solution

The fourth proportional to 21,945.69, 32,918.54 and 12,079.89 is: 18,119.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,945.69 : 32,918.54 = 12,079.89 : x
  2. Step 2: Convert to fraction form
    21,945.69/32,918.54 = 12,079.89/x
  3. Step 3: Cross multiply
    21,945.69x = 32,918.54 × 12,079.89
  4. Step 4: Simplify right side
    21,945.69x = 397,652,281.76
  5. Step 5: Solve for x
    x = 397,652,281.76/21,945.69
  6. Step 6: Final answer
    x = 18,119.84

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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.