Home / 20,381.76-30,556.44-7,901.28

Finding the Fourth Proportional to 20,381.76, 30,556.44 and 7,901.28

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Solution

The fourth proportional to 20,381.76, 30,556.44 and 7,901.28 is: 11,845.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,381.76 : 30,556.44 = 7,901.28 : x
  2. Step 2: Convert to fraction form
    20,381.76/30,556.44 = 7,901.28/x
  3. Step 3: Cross multiply
    20,381.76x = 30,556.44 × 7,901.28
  4. Step 4: Simplify right side
    20,381.76x = 241,434,988.24
  5. Step 5: Solve for x
    x = 241,434,988.24/20,381.76
  6. Step 6: Final answer
    x = 11,845.64

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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.