Home / 20,741.72-28,615.36-12,770.08

Finding the Fourth Proportional to 20,741.72, 28,615.36 and 12,770.08

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Solution

The fourth proportional to 20,741.72, 28,615.36 and 12,770.08 is: 17,617.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,741.72 : 28,615.36 = 12,770.08 : x
  2. Step 2: Convert to fraction form
    20,741.72/28,615.36 = 12,770.08/x
  3. Step 3: Cross multiply
    20,741.72x = 28,615.36 × 12,770.08
  4. Step 4: Simplify right side
    20,741.72x = 365,420,436.43
  5. Step 5: Solve for x
    x = 365,420,436.43/20,741.72
  6. Step 6: Final answer
    x = 17,617.65

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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.