Home / 20,577.42-28,396.83-11,145.90

Finding the Fourth Proportional to 20,577.42, 28,396.83 and 11,145.90

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Solution

The fourth proportional to 20,577.42, 28,396.83 and 11,145.90 is: 15,381.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,577.42 : 28,396.83 = 11,145.90 : x
  2. Step 2: Convert to fraction form
    20,577.42/28,396.83 = 11,145.90/x
  3. Step 3: Cross multiply
    20,577.42x = 28,396.83 × 11,145.90
  4. Step 4: Simplify right side
    20,577.42x = 316,508,227.50
  5. Step 5: Solve for x
    x = 316,508,227.50/20,577.42
  6. Step 6: Final answer
    x = 15,381.34

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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.