Home / 20,373.77-28,115.90-11,881.78

Finding the Fourth Proportional to 20,373.77, 28,115.90 and 11,881.78

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Solution

The fourth proportional to 20,373.77, 28,115.90 and 11,881.78 is: 16,396.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,373.77 : 28,115.90 = 11,881.78 : x
  2. Step 2: Convert to fraction form
    20,373.77/28,115.90 = 11,881.78/x
  3. Step 3: Cross multiply
    20,373.77x = 28,115.90 × 11,881.78
  4. Step 4: Simplify right side
    20,373.77x = 334,066,938.30
  5. Step 5: Solve for x
    x = 334,066,938.30/20,373.77
  6. Step 6: Final answer
    x = 16,396.91

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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.