Home / 20,577-28,396.26-11,145.57

Finding the Fourth Proportional to 20,577, 28,396.26 and 11,145.57

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Solution

The fourth proportional to 20,577, 28,396.26 and 11,145.57 is: 15,380.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,577 : 28,396.26 = 11,145.57 : x
  2. Step 2: Convert to fraction form
    20,577/28,396.26 = 11,145.57/x
  3. Step 3: Cross multiply
    20,577x = 28,396.26 × 11,145.57
  4. Step 4: Simplify right side
    20,577x = 316,492,503.57
  5. Step 5: Solve for x
    x = 316,492,503.57/20,577
  6. Step 6: Final answer
    x = 15,380.89

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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.