Home / 20,976.03-28,950.75-13,902.30

Finding the Fourth Proportional to 20,976.03, 28,950.75 and 13,902.30

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Solution

The fourth proportional to 20,976.03, 28,950.75 and 13,902.30 is: 19,187.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.03 : 28,950.75 = 13,902.30 : x
  2. Step 2: Convert to fraction form
    20,976.03/28,950.75 = 13,902.30/x
  3. Step 3: Cross multiply
    20,976.03x = 28,950.75 × 13,902.30
  4. Step 4: Simplify right side
    20,976.03x = 402,482,011.73
  5. Step 5: Solve for x
    x = 402,482,011.73/20,976.03
  6. Step 6: Final answer
    x = 19,187.71

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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.