Home / 20,623.31-28,459.86-12,126.41

Finding the Fourth Proportional to 20,623.31, 28,459.86 and 12,126.41

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Solution

The fourth proportional to 20,623.31, 28,459.86 and 12,126.41 is: 16,734.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,623.31 : 28,459.86 = 12,126.41 : x
  2. Step 2: Convert to fraction form
    20,623.31/28,459.86 = 12,126.41/x
  3. Step 3: Cross multiply
    20,623.31x = 28,459.86 × 12,126.41
  4. Step 4: Simplify right side
    20,623.31x = 345,115,930.90
  5. Step 5: Solve for x
    x = 345,115,930.90/20,623.31
  6. Step 6: Final answer
    x = 16,734.26

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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.