Home / 20,928.06-28,882.62-13,758.35

Finding the Fourth Proportional to 20,928.06, 28,882.62 and 13,758.35

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Solution

The fourth proportional to 20,928.06, 28,882.62 and 13,758.35 is: 18,987.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.06 : 28,882.62 = 13,758.35 : x
  2. Step 2: Convert to fraction form
    20,928.06/28,882.62 = 13,758.35/x
  3. Step 3: Cross multiply
    20,928.06x = 28,882.62 × 13,758.35
  4. Step 4: Simplify right side
    20,928.06x = 397,377,050.46
  5. Step 5: Solve for x
    x = 397,377,050.46/20,928.06
  6. Step 6: Final answer
    x = 18,987.76

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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.