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Finding the Fourth Proportional to 18,862.20, 28,322.10 and 11,086.20

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Solution

The fourth proportional to 18,862.20, 28,322.10 and 11,086.20 is: 16,646.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,862.20 : 28,322.10 = 11,086.20 : x
  2. Step 2: Convert to fraction form
    18,862.20/28,322.10 = 11,086.20/x
  3. Step 3: Cross multiply
    18,862.20x = 28,322.10 × 11,086.20
  4. Step 4: Simplify right side
    18,862.20x = 313,984,465.02
  5. Step 5: Solve for x
    x = 313,984,465.02/18,862.20
  6. Step 6: Final answer
    x = 16,646.23

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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.