Home / 20,960.40-28,926.60-12,009

Finding the Fourth Proportional to 20,960.40, 28,926.60 and 12,009

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Solution

The fourth proportional to 20,960.40, 28,926.60 and 12,009 is: 16,573.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.40 : 28,926.60 = 12,009 : x
  2. Step 2: Convert to fraction form
    20,960.40/28,926.60 = 12,009/x
  3. Step 3: Cross multiply
    20,960.40x = 28,926.60 × 12,009
  4. Step 4: Simplify right side
    20,960.40x = 347,379,539.40
  5. Step 5: Solve for x
    x = 347,379,539.40/20,960.40
  6. Step 6: Final answer
    x = 16,573.14

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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.