Home / 20,910.46-28,848.99-12,406.09

Finding the Fourth Proportional to 20,910.46, 28,848.99 and 12,406.09

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Solution

The fourth proportional to 20,910.46, 28,848.99 and 12,406.09 is: 17,115.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.46 : 28,848.99 = 12,406.09 : x
  2. Step 2: Convert to fraction form
    20,910.46/28,848.99 = 12,406.09/x
  3. Step 3: Cross multiply
    20,910.46x = 28,848.99 × 12,406.09
  4. Step 4: Simplify right side
    20,910.46x = 357,903,166.35
  5. Step 5: Solve for x
    x = 357,903,166.35/20,910.46
  6. Step 6: Final answer
    x = 17,115.99

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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.