Home / 20,903.25-28,845.44-12,405.74

Finding the Fourth Proportional to 20,903.25, 28,845.44 and 12,405.74

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Solution

The fourth proportional to 20,903.25, 28,845.44 and 12,405.74 is: 17,119.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,903.25 : 28,845.44 = 12,405.74 : x
  2. Step 2: Convert to fraction form
    20,903.25/28,845.44 = 12,405.74/x
  3. Step 3: Cross multiply
    20,903.25x = 28,845.44 × 12,405.74
  4. Step 4: Simplify right side
    20,903.25x = 357,848,869.09
  5. Step 5: Solve for x
    x = 357,848,869.09/20,903.25
  6. Step 6: Final answer
    x = 17,119.29

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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.