Home / 20,939.15-28,895.51-11,986.08

Finding the Fourth Proportional to 20,939.15, 28,895.51 and 11,986.08

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Solution

The fourth proportional to 20,939.15, 28,895.51 and 11,986.08 is: 16,540.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.15 : 28,895.51 = 11,986.08 : x
  2. Step 2: Convert to fraction form
    20,939.15/28,895.51 = 11,986.08/x
  3. Step 3: Cross multiply
    20,939.15x = 28,895.51 × 11,986.08
  4. Step 4: Simplify right side
    20,939.15x = 346,343,894.50
  5. Step 5: Solve for x
    x = 346,343,894.50/20,939.15
  6. Step 6: Final answer
    x = 16,540.49

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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.