Home / 14,780.75-20,390.91-9,998.98

Finding the Fourth Proportional to 14,780.75, 20,390.91 and 9,998.98

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Solution

The fourth proportional to 14,780.75, 20,390.91 and 9,998.98 is: 13,794.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,780.75 : 20,390.91 = 9,998.98 : x
  2. Step 2: Convert to fraction form
    14,780.75/20,390.91 = 9,998.98/x
  3. Step 3: Cross multiply
    14,780.75x = 20,390.91 × 9,998.98
  4. Step 4: Simplify right side
    14,780.75x = 203,888,212.80
  5. Step 5: Solve for x
    x = 203,888,212.80/14,780.75
  6. Step 6: Final answer
    x = 13,794.18

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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.