Home / 18,788.12-28,168.83-9,421.38

Finding the Fourth Proportional to 18,788.12, 28,168.83 and 9,421.38

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Solution

The fourth proportional to 18,788.12, 28,168.83 and 9,421.38 is: 14,125.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,788.12 : 28,168.83 = 9,421.38 : x
  2. Step 2: Convert to fraction form
    18,788.12/28,168.83 = 9,421.38/x
  3. Step 3: Cross multiply
    18,788.12x = 28,168.83 × 9,421.38
  4. Step 4: Simplify right side
    18,788.12x = 265,389,251.59
  5. Step 5: Solve for x
    x = 265,389,251.59/18,788.12
  6. Step 6: Final answer
    x = 14,125.38

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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.