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Finding the Fourth Proportional to 18,538.80, 27,808.20 and 16,465.20

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Solution

The fourth proportional to 18,538.80, 27,808.20 and 16,465.20 is: 24,697.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,538.80 : 27,808.20 = 16,465.20 : x
  2. Step 2: Convert to fraction form
    18,538.80/27,808.20 = 16,465.20/x
  3. Step 3: Cross multiply
    18,538.80x = 27,808.20 × 16,465.20
  4. Step 4: Simplify right side
    18,538.80x = 457,867,574.64
  5. Step 5: Solve for x
    x = 457,867,574.64/18,538.80
  6. Step 6: Final answer
    x = 24,697.80

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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.