Home / 28,406.67-39,201.20-15,660.06

Finding the Fourth Proportional to 28,406.67, 39,201.20 and 15,660.06

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Solution

The fourth proportional to 28,406.67, 39,201.20 and 15,660.06 is: 21,610.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,406.67 : 39,201.20 = 15,660.06 : x
  2. Step 2: Convert to fraction form
    28,406.67/39,201.20 = 15,660.06/x
  3. Step 3: Cross multiply
    28,406.67x = 39,201.20 × 15,660.06
  4. Step 4: Simplify right side
    28,406.67x = 613,893,065.77
  5. Step 5: Solve for x
    x = 613,893,065.77/28,406.67
  6. Step 6: Final answer
    x = 21,610.88

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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.