Home / 28,131.35-38,808.03-20,066.78

Finding the Fourth Proportional to 28,131.35, 38,808.03 and 20,066.78

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Solution

The fourth proportional to 28,131.35, 38,808.03 and 20,066.78 is: 27,682.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,131.35 : 38,808.03 = 20,066.78 : x
  2. Step 2: Convert to fraction form
    28,131.35/38,808.03 = 20,066.78/x
  3. Step 3: Cross multiply
    28,131.35x = 38,808.03 × 20,066.78
  4. Step 4: Simplify right side
    28,131.35x = 778,752,200.24
  5. Step 5: Solve for x
    x = 778,752,200.24/28,131.35
  6. Step 6: Final answer
    x = 27,682.72

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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.