Home / 20,510.36-28,304.30-11,078.92

Finding the Fourth Proportional to 20,510.36, 28,304.30 and 11,078.92

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Solution

The fourth proportional to 20,510.36, 28,304.30 and 11,078.92 is: 15,288.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.36 : 28,304.30 = 11,078.92 : x
  2. Step 2: Convert to fraction form
    20,510.36/28,304.30 = 11,078.92/x
  3. Step 3: Cross multiply
    20,510.36x = 28,304.30 × 11,078.92
  4. Step 4: Simplify right side
    20,510.36x = 313,581,032.29
  5. Step 5: Solve for x
    x = 313,581,032.29/20,510.36
  6. Step 6: Final answer
    x = 15,288.91

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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.