Home / 12,663.47-18,993.76-3,428.75

Finding the Fourth Proportional to 12,663.47, 18,993.76 and 3,428.75

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Solution

The fourth proportional to 12,663.47, 18,993.76 and 3,428.75 is: 5,142.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,663.47 : 18,993.76 = 3,428.75 : x
  2. Step 2: Convert to fraction form
    12,663.47/18,993.76 = 3,428.75/x
  3. Step 3: Cross multiply
    12,663.47x = 18,993.76 × 3,428.75
  4. Step 4: Simplify right side
    12,663.47x = 65,124,854.60
  5. Step 5: Solve for x
    x = 65,124,854.60/12,663.47
  6. Step 6: Final answer
    x = 5,142.73

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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.