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Finding the Fourth Proportional to 18,808.80, 28,180.80 and 15,892.80

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Solution

The fourth proportional to 18,808.80, 28,180.80 and 15,892.80 is: 23,811.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808.80 : 28,180.80 = 15,892.80 : x
  2. Step 2: Convert to fraction form
    18,808.80/28,180.80 = 15,892.80/x
  3. Step 3: Cross multiply
    18,808.80x = 28,180.80 × 15,892.80
  4. Step 4: Simplify right side
    18,808.80x = 447,871,818.24
  5. Step 5: Solve for x
    x = 447,871,818.24/18,808.80
  6. Step 6: Final answer
    x = 23,811.82

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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.