Home / 21,076.04-31,610.28-7,928.84

Finding the Fourth Proportional to 21,076.04, 31,610.28 and 7,928.84

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Solution

The fourth proportional to 21,076.04, 31,610.28 and 7,928.84 is: 11,891.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,076.04 : 31,610.28 = 7,928.84 : x
  2. Step 2: Convert to fraction form
    21,076.04/31,610.28 = 7,928.84/x
  3. Step 3: Cross multiply
    21,076.04x = 31,610.28 × 7,928.84
  4. Step 4: Simplify right side
    21,076.04x = 250,632,852.48
  5. Step 5: Solve for x
    x = 250,632,852.48/21,076.04
  6. Step 6: Final answer
    x = 11,891.84

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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.