Home / 20,900.28-28,828.73-12,396.04

Finding the Fourth Proportional to 20,900.28, 28,828.73 and 12,396.04

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Solution

The fourth proportional to 20,900.28, 28,828.73 and 12,396.04 is: 17,098.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.28 : 28,828.73 = 12,396.04 : x
  2. Step 2: Convert to fraction form
    20,900.28/28,828.73 = 12,396.04/x
  3. Step 3: Cross multiply
    20,900.28x = 28,828.73 × 12,396.04
  4. Step 4: Simplify right side
    20,900.28x = 357,362,090.23
  5. Step 5: Solve for x
    x = 357,362,090.23/20,900.28
  6. Step 6: Final answer
    x = 17,098.44

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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.