Home / 20,576.64-28,395.84-11,145.12

Finding the Fourth Proportional to 20,576.64, 28,395.84 and 11,145.12

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Solution

The fourth proportional to 20,576.64, 28,395.84 and 11,145.12 is: 15,380.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,576.64 : 28,395.84 = 11,145.12 : x
  2. Step 2: Convert to fraction form
    20,576.64/28,395.84 = 11,145.12/x
  3. Step 3: Cross multiply
    20,576.64x = 28,395.84 × 11,145.12
  4. Step 4: Simplify right side
    20,576.64x = 316,475,044.30
  5. Step 5: Solve for x
    x = 316,475,044.30/20,576.64
  6. Step 6: Final answer
    x = 15,380.31

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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.