Home / 12,666.38-18,999.57-3,432.38

Finding the Fourth Proportional to 12,666.38, 18,999.57 and 3,432.38

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Solution

The fourth proportional to 12,666.38, 18,999.57 and 3,432.38 is: 5,148.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,666.38 : 18,999.57 = 3,432.38 : x
  2. Step 2: Convert to fraction form
    12,666.38/18,999.57 = 3,432.38/x
  3. Step 3: Cross multiply
    12,666.38x = 18,999.57 × 3,432.38
  4. Step 4: Simplify right side
    12,666.38x = 65,213,631.92
  5. Step 5: Solve for x
    x = 65,213,631.92/12,666.38
  6. Step 6: Final answer
    x = 5,148.56

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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.