Home / 18,990.52-28,458.06-13,440.85

Finding the Fourth Proportional to 18,990.52, 28,458.06 and 13,440.85

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Solution

The fourth proportional to 18,990.52, 28,458.06 and 13,440.85 is: 20,141.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990.52 : 28,458.06 = 13,440.85 : x
  2. Step 2: Convert to fraction form
    18,990.52/28,458.06 = 13,440.85/x
  3. Step 3: Cross multiply
    18,990.52x = 28,458.06 × 13,440.85
  4. Step 4: Simplify right side
    18,990.52x = 382,500,515.75
  5. Step 5: Solve for x
    x = 382,500,515.75/18,990.52
  6. Step 6: Final answer
    x = 20,141.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.