Home / 20,133.22-27,774.45-15,409.30

Finding the Fourth Proportional to 20,133.22, 27,774.45 and 15,409.30

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Solution

The fourth proportional to 20,133.22, 27,774.45 and 15,409.30 is: 21,257.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,133.22 : 27,774.45 = 15,409.30 : x
  2. Step 2: Convert to fraction form
    20,133.22/27,774.45 = 15,409.30/x
  3. Step 3: Cross multiply
    20,133.22x = 27,774.45 × 15,409.30
  4. Step 4: Simplify right side
    20,133.22x = 427,984,832.39
  5. Step 5: Solve for x
    x = 427,984,832.39/20,133.22
  6. Step 6: Final answer
    x = 21,257.64

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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.