Home / 21,007.50-28,990.44-11,575.86

Finding the Fourth Proportional to 21,007.50, 28,990.44 and 11,575.86

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Solution

The fourth proportional to 21,007.50, 28,990.44 and 11,575.86 is: 15,974.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.50 : 28,990.44 = 11,575.86 : x
  2. Step 2: Convert to fraction form
    21,007.50/28,990.44 = 11,575.86/x
  3. Step 3: Cross multiply
    21,007.50x = 28,990.44 × 11,575.86
  4. Step 4: Simplify right side
    21,007.50x = 335,589,274.78
  5. Step 5: Solve for x
    x = 335,589,274.78/21,007.50
  6. Step 6: Final answer
    x = 15,974.74

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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.