Home / 28,415.27-39,210.87-15,668.42

Finding the Fourth Proportional to 28,415.27, 39,210.87 and 15,668.42

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Solution

The fourth proportional to 28,415.27, 39,210.87 and 15,668.42 is: 21,621.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,415.27 : 39,210.87 = 15,668.42 : x
  2. Step 2: Convert to fraction form
    28,415.27/39,210.87 = 15,668.42/x
  3. Step 3: Cross multiply
    28,415.27x = 39,210.87 × 15,668.42
  4. Step 4: Simplify right side
    28,415.27x = 614,372,379.73
  5. Step 5: Solve for x
    x = 614,372,379.73/28,415.27
  6. Step 6: Final answer
    x = 21,621.21

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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.