Home / 13,556.72-18,708.08-8,247.78

Finding the Fourth Proportional to 13,556.72, 18,708.08 and 8,247.78

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Solution

The fourth proportional to 13,556.72, 18,708.08 and 8,247.78 is: 11,381.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,556.72 : 18,708.08 = 8,247.78 : x
  2. Step 2: Convert to fraction form
    13,556.72/18,708.08 = 8,247.78/x
  3. Step 3: Cross multiply
    13,556.72x = 18,708.08 × 8,247.78
  4. Step 4: Simplify right side
    13,556.72x = 154,300,086.82
  5. Step 5: Solve for x
    x = 154,300,086.82/13,556.72
  6. Step 6: Final answer
    x = 11,381.82

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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.