Home / 28,405.66-39,198.14-15,660.58

Finding the Fourth Proportional to 28,405.66, 39,198.14 and 15,660.58

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Solution

The fourth proportional to 28,405.66, 39,198.14 and 15,660.58 is: 21,610.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,405.66 : 39,198.14 = 15,660.58 : x
  2. Step 2: Convert to fraction form
    28,405.66/39,198.14 = 15,660.58/x
  3. Step 3: Cross multiply
    28,405.66x = 39,198.14 × 15,660.58
  4. Step 4: Simplify right side
    28,405.66x = 613,865,607.32
  5. Step 5: Solve for x
    x = 613,865,607.32/28,405.66
  6. Step 6: Final answer
    x = 21,610.68

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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.