Home / 18,930.39-28,458.50-13,423.20

Finding the Fourth Proportional to 18,930.39, 28,458.50 and 13,423.20

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Solution

The fourth proportional to 18,930.39, 28,458.50 and 13,423.20 is: 20,179.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930.39 : 28,458.50 = 13,423.20 : x
  2. Step 2: Convert to fraction form
    18,930.39/28,458.50 = 13,423.20/x
  3. Step 3: Cross multiply
    18,930.39x = 28,458.50 × 13,423.20
  4. Step 4: Simplify right side
    18,930.39x = 382,004,070.08
  5. Step 5: Solve for x
    x = 382,004,070.08/18,930.39
  6. Step 6: Final answer
    x = 20,179.41

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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.