Home / 21,008.26-28,990.65-11,576.80

Finding the Fourth Proportional to 21,008.26, 28,990.65 and 11,576.80

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Solution

The fourth proportional to 21,008.26, 28,990.65 and 11,576.80 is: 15,975.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.26 : 28,990.65 = 11,576.80 : x
  2. Step 2: Convert to fraction form
    21,008.26/28,990.65 = 11,576.80/x
  3. Step 3: Cross multiply
    21,008.26x = 28,990.65 × 11,576.80
  4. Step 4: Simplify right side
    21,008.26x = 335,618,956.92
  5. Step 5: Solve for x
    x = 335,618,956.92/21,008.26
  6. Step 6: Final answer
    x = 15,975.57

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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.