Home / 20,510.31-28,304.24-11,078.88

Finding the Fourth Proportional to 20,510.31, 28,304.24 and 11,078.88

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Solution

The fourth proportional to 20,510.31, 28,304.24 and 11,078.88 is: 15,288.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.31 : 28,304.24 = 11,078.88 : x
  2. Step 2: Convert to fraction form
    20,510.31/28,304.24 = 11,078.88/x
  3. Step 3: Cross multiply
    20,510.31x = 28,304.24 × 11,078.88
  4. Step 4: Simplify right side
    20,510.31x = 313,579,164.63
  5. Step 5: Solve for x
    x = 313,579,164.63/20,510.31
  6. Step 6: Final answer
    x = 15,288.85

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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.