Home / 21,008.20-28,990.60-11,576.76

Finding the Fourth Proportional to 21,008.20, 28,990.60 and 11,576.76

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Solution

The fourth proportional to 21,008.20, 28,990.60 and 11,576.76 is: 15,975.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.20 : 28,990.60 = 11,576.76 : x
  2. Step 2: Convert to fraction form
    21,008.20/28,990.60 = 11,576.76/x
  3. Step 3: Cross multiply
    21,008.20x = 28,990.60 × 11,576.76
  4. Step 4: Simplify right side
    21,008.20x = 335,617,218.46
  5. Step 5: Solve for x
    x = 335,617,218.46/21,008.20
  6. Step 6: Final answer
    x = 15,975.53

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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.