Home / 20,577.38-28,396.79-11,145.94

Finding the Fourth Proportional to 20,577.38, 28,396.79 and 11,145.94

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Solution

The fourth proportional to 20,577.38, 28,396.79 and 11,145.94 is: 15,381.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,577.38 : 28,396.79 = 11,145.94 : x
  2. Step 2: Convert to fraction form
    20,577.38/28,396.79 = 11,145.94/x
  3. Step 3: Cross multiply
    20,577.38x = 28,396.79 × 11,145.94
  4. Step 4: Simplify right side
    20,577.38x = 316,508,832.61
  5. Step 5: Solve for x
    x = 316,508,832.61/20,577.38
  6. Step 6: Final answer
    x = 15,381.40

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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.