Home / 20,290.96-28,037.29-15,615.64

Finding the Fourth Proportional to 20,290.96, 28,037.29 and 15,615.64

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Solution

The fourth proportional to 20,290.96, 28,037.29 and 15,615.64 is: 21,577.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,290.96 : 28,037.29 = 15,615.64 : x
  2. Step 2: Convert to fraction form
    20,290.96/28,037.29 = 15,615.64/x
  3. Step 3: Cross multiply
    20,290.96x = 28,037.29 × 15,615.64
  4. Step 4: Simplify right side
    20,290.96x = 437,820,087.03
  5. Step 5: Solve for x
    x = 437,820,087.03/20,290.96
  6. Step 6: Final answer
    x = 21,577.11

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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.