Home / 12,428.38-18,643.48-3,543.54

Finding the Fourth Proportional to 12,428.38, 18,643.48 and 3,543.54

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Solution

The fourth proportional to 12,428.38, 18,643.48 and 3,543.54 is: 5,315.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.38 : 18,643.48 = 3,543.54 : x
  2. Step 2: Convert to fraction form
    12,428.38/18,643.48 = 3,543.54/x
  3. Step 3: Cross multiply
    12,428.38x = 18,643.48 × 3,543.54
  4. Step 4: Simplify right side
    12,428.38x = 66,063,917.12
  5. Step 5: Solve for x
    x = 66,063,917.12/12,428.38
  6. Step 6: Final answer
    x = 5,315.57

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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.