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Finding the Fourth Proportional to 18,950.10, 28,421.01 and 11,035.86

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Solution

The fourth proportional to 18,950.10, 28,421.01 and 11,035.86 is: 16,551.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,950.10 : 28,421.01 = 11,035.86 : x
  2. Step 2: Convert to fraction form
    18,950.10/28,421.01 = 11,035.86/x
  3. Step 3: Cross multiply
    18,950.10x = 28,421.01 × 11,035.86
  4. Step 4: Simplify right side
    18,950.10x = 313,650,287.42
  5. Step 5: Solve for x
    x = 313,650,287.42/18,950.10
  6. Step 6: Final answer
    x = 16,551.38

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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.