Home / 20,588.58-28,412.28-11,157.12

Finding the Fourth Proportional to 20,588.58, 28,412.28 and 11,157.12

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Solution

The fourth proportional to 20,588.58, 28,412.28 and 11,157.12 is: 15,396.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,588.58 : 28,412.28 = 11,157.12 : x
  2. Step 2: Convert to fraction form
    20,588.58/28,412.28 = 11,157.12/x
  3. Step 3: Cross multiply
    20,588.58x = 28,412.28 × 11,157.12
  4. Step 4: Simplify right side
    20,588.58x = 316,999,217.43
  5. Step 5: Solve for x
    x = 316,999,217.43/20,588.58
  6. Step 6: Final answer
    x = 15,396.85

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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.