Home / 20,128.50-27,777.33-11,177.46

Finding the Fourth Proportional to 20,128.50, 27,777.33 and 11,177.46

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Solution

The fourth proportional to 20,128.50, 27,777.33 and 11,177.46 is: 15,424.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.50 : 27,777.33 = 11,177.46 : x
  2. Step 2: Convert to fraction form
    20,128.50/27,777.33 = 11,177.46/x
  3. Step 3: Cross multiply
    20,128.50x = 27,777.33 × 11,177.46
  4. Step 4: Simplify right side
    20,128.50x = 310,479,994.98
  5. Step 5: Solve for x
    x = 310,479,994.98/20,128.50
  6. Step 6: Final answer
    x = 15,424.89

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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.