Home / 28,407.99-39,203.30-15,661.64

Finding the Fourth Proportional to 28,407.99, 39,203.30 and 15,661.64

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Solution

The fourth proportional to 28,407.99, 39,203.30 and 15,661.64 is: 21,613.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,407.99 : 39,203.30 = 15,661.64 : x
  2. Step 2: Convert to fraction form
    28,407.99/39,203.30 = 15,661.64/x
  3. Step 3: Cross multiply
    28,407.99x = 39,203.30 × 15,661.64
  4. Step 4: Simplify right side
    28,407.99x = 613,987,954.27
  5. Step 5: Solve for x
    x = 613,987,954.27/28,407.99
  6. Step 6: Final answer
    x = 21,613.21

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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.