Home / 20,003.60-27,608.36-15,215.87

Finding the Fourth Proportional to 20,003.60, 27,608.36 and 15,215.87

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Solution

The fourth proportional to 20,003.60, 27,608.36 and 15,215.87 is: 21,000.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,003.60 : 27,608.36 = 15,215.87 : x
  2. Step 2: Convert to fraction form
    20,003.60/27,608.36 = 15,215.87/x
  3. Step 3: Cross multiply
    20,003.60x = 27,608.36 × 15,215.87
  4. Step 4: Simplify right side
    20,003.60x = 420,085,002.55
  5. Step 5: Solve for x
    x = 420,085,002.55/20,003.60
  6. Step 6: Final answer
    x = 21,000.48

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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.