Home / 28,157.72-42,221-11,529.44

Finding the Fourth Proportional to 28,157.72, 42,221 and 11,529.44

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Solution

The fourth proportional to 28,157.72, 42,221 and 11,529.44 is: 17,287.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,157.72 : 42,221 = 11,529.44 : x
  2. Step 2: Convert to fraction form
    28,157.72/42,221 = 11,529.44/x
  3. Step 3: Cross multiply
    28,157.72x = 42,221 × 11,529.44
  4. Step 4: Simplify right side
    28,157.72x = 486,784,486.24
  5. Step 5: Solve for x
    x = 486,784,486.24/28,157.72
  6. Step 6: Final answer
    x = 17,287.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.