Home / 20,211.37-30,276.87-15,808.21

Finding the Fourth Proportional to 20,211.37, 30,276.87 and 15,808.21

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Solution

The fourth proportional to 20,211.37, 30,276.87 and 15,808.21 is: 23,680.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,211.37 : 30,276.87 = 15,808.21 : x
  2. Step 2: Convert to fraction form
    20,211.37/30,276.87 = 15,808.21/x
  3. Step 3: Cross multiply
    20,211.37x = 30,276.87 × 15,808.21
  4. Step 4: Simplify right side
    20,211.37x = 478,623,119.10
  5. Step 5: Solve for x
    x = 478,623,119.10/20,211.37
  6. Step 6: Final answer
    x = 23,680.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.