Home / 13,605.48-18,760.10-12,278.76

Finding the Fourth Proportional to 13,605.48, 18,760.10 and 12,278.76

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Solution

The fourth proportional to 13,605.48, 18,760.10 and 12,278.76 is: 16,930.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,605.48 : 18,760.10 = 12,278.76 : x
  2. Step 2: Convert to fraction form
    13,605.48/18,760.10 = 12,278.76/x
  3. Step 3: Cross multiply
    13,605.48x = 18,760.10 × 12,278.76
  4. Step 4: Simplify right side
    13,605.48x = 230,350,765.48
  5. Step 5: Solve for x
    x = 230,350,765.48/13,605.48
  6. Step 6: Final answer
    x = 16,930.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.