Home / 12,420.38-18,630.73-6,884.54

Finding the Fourth Proportional to 12,420.38, 18,630.73 and 6,884.54

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Solution

The fourth proportional to 12,420.38, 18,630.73 and 6,884.54 is: 10,326.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.38 : 18,630.73 = 6,884.54 : x
  2. Step 2: Convert to fraction form
    12,420.38/18,630.73 = 6,884.54/x
  3. Step 3: Cross multiply
    12,420.38x = 18,630.73 × 6,884.54
  4. Step 4: Simplify right side
    12,420.38x = 128,264,005.91
  5. Step 5: Solve for x
    x = 128,264,005.91/12,420.38
  6. Step 6: Final answer
    x = 10,326.90

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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.