Home / 20,756.86-28,645.10-11,805.65

Finding the Fourth Proportional to 20,756.86, 28,645.10 and 11,805.65

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Solution

The fourth proportional to 20,756.86, 28,645.10 and 11,805.65 is: 16,292.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.86 : 28,645.10 = 11,805.65 : x
  2. Step 2: Convert to fraction form
    20,756.86/28,645.10 = 11,805.65/x
  3. Step 3: Cross multiply
    20,756.86x = 28,645.10 × 11,805.65
  4. Step 4: Simplify right side
    20,756.86x = 338,173,995.30
  5. Step 5: Solve for x
    x = 338,173,995.30/20,756.86
  6. Step 6: Final answer
    x = 16,292.16

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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.