Home / 20,404.08-28,157.82-13,330.50

Finding the Fourth Proportional to 20,404.08, 28,157.82 and 13,330.50

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Solution

The fourth proportional to 20,404.08, 28,157.82 and 13,330.50 is: 18,396.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,404.08 : 28,157.82 = 13,330.50 : x
  2. Step 2: Convert to fraction form
    20,404.08/28,157.82 = 13,330.50/x
  3. Step 3: Cross multiply
    20,404.08x = 28,157.82 × 13,330.50
  4. Step 4: Simplify right side
    20,404.08x = 375,357,819.51
  5. Step 5: Solve for x
    x = 375,357,819.51/20,404.08
  6. Step 6: Final answer
    x = 18,396.21

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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.