Home / 28,406.07-39,198.61-15,658.60

Finding the Fourth Proportional to 28,406.07, 39,198.61 and 15,658.60

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Solution

The fourth proportional to 28,406.07, 39,198.61 and 15,658.60 is: 21,607.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,406.07 : 39,198.61 = 15,658.60 : x
  2. Step 2: Convert to fraction form
    28,406.07/39,198.61 = 15,658.60/x
  3. Step 3: Cross multiply
    28,406.07x = 39,198.61 × 15,658.60
  4. Step 4: Simplify right side
    28,406.07x = 613,795,158.55
  5. Step 5: Solve for x
    x = 613,795,158.55/28,406.07
  6. Step 6: Final answer
    x = 21,607.89

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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.