Home / 20,510.35-28,304.28-11,078.91

Finding the Fourth Proportional to 20,510.35, 28,304.28 and 11,078.91

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Solution

The fourth proportional to 20,510.35, 28,304.28 and 11,078.91 is: 15,288.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.35 : 28,304.28 = 11,078.91 : x
  2. Step 2: Convert to fraction form
    20,510.35/28,304.28 = 11,078.91/x
  3. Step 3: Cross multiply
    20,510.35x = 28,304.28 × 11,078.91
  4. Step 4: Simplify right side
    20,510.35x = 313,580,570.73
  5. Step 5: Solve for x
    x = 313,580,570.73/20,510.35
  6. Step 6: Final answer
    x = 15,288.89

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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.