Home / 20,487.44-28,272.72-11,535.08

Finding the Fourth Proportional to 20,487.44, 28,272.72 and 11,535.08

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Solution

The fourth proportional to 20,487.44, 28,272.72 and 11,535.08 is: 15,918.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.44 : 28,272.72 = 11,535.08 : x
  2. Step 2: Convert to fraction form
    20,487.44/28,272.72 = 11,535.08/x
  3. Step 3: Cross multiply
    20,487.44x = 28,272.72 × 11,535.08
  4. Step 4: Simplify right side
    20,487.44x = 326,128,087.02
  5. Step 5: Solve for x
    x = 326,128,087.02/20,487.44
  6. Step 6: Final answer
    x = 15,918.44

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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.