Home / 21,138.88-31,708.32-5,556.48

Finding the Fourth Proportional to 21,138.88, 31,708.32 and 5,556.48

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Solution

The fourth proportional to 21,138.88, 31,708.32 and 5,556.48 is: 8,334.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.88 : 31,708.32 = 5,556.48 : x
  2. Step 2: Convert to fraction form
    21,138.88/31,708.32 = 5,556.48/x
  3. Step 3: Cross multiply
    21,138.88x = 31,708.32 × 5,556.48
  4. Step 4: Simplify right side
    21,138.88x = 176,186,645.91
  5. Step 5: Solve for x
    x = 176,186,645.91/21,138.88
  6. Step 6: Final answer
    x = 8,334.72

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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.