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Finding the Fourth Proportional to 18,774.96, 28,023.90 and 16,561.20

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Solution

The fourth proportional to 18,774.96, 28,023.90 and 16,561.20 is: 24,719.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.96 : 28,023.90 = 16,561.20 : x
  2. Step 2: Convert to fraction form
    18,774.96/28,023.90 = 16,561.20/x
  3. Step 3: Cross multiply
    18,774.96x = 28,023.90 × 16,561.20
  4. Step 4: Simplify right side
    18,774.96x = 464,109,412.68
  5. Step 5: Solve for x
    x = 464,109,412.68/18,774.96
  6. Step 6: Final answer
    x = 24,719.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.