Home / 20,742.31-28,623.26-11,788.57

Finding the Fourth Proportional to 20,742.31, 28,623.26 and 11,788.57

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Solution

The fourth proportional to 20,742.31, 28,623.26 and 11,788.57 is: 16,267.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.31 : 28,623.26 = 11,788.57 : x
  2. Step 2: Convert to fraction form
    20,742.31/28,623.26 = 11,788.57/x
  3. Step 3: Cross multiply
    20,742.31x = 28,623.26 × 11,788.57
  4. Step 4: Simplify right side
    20,742.31x = 337,427,102.08
  5. Step 5: Solve for x
    x = 337,427,102.08/20,742.31
  6. Step 6: Final answer
    x = 16,267.58

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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.