Home / 21,014.20-28,999.68-11,582.80

Finding the Fourth Proportional to 21,014.20, 28,999.68 and 11,582.80

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Solution

The fourth proportional to 21,014.20, 28,999.68 and 11,582.80 is: 15,984.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,014.20 : 28,999.68 = 11,582.80 : x
  2. Step 2: Convert to fraction form
    21,014.20/28,999.68 = 11,582.80/x
  3. Step 3: Cross multiply
    21,014.20x = 28,999.68 × 11,582.80
  4. Step 4: Simplify right side
    21,014.20x = 335,897,493.50
  5. Step 5: Solve for x
    x = 335,897,493.50/21,014.20
  6. Step 6: Final answer
    x = 15,984.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.