Home / 20,849.04-31,232.40-13,428

Finding the Fourth Proportional to 20,849.04, 31,232.40 and 13,428

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Solution

The fourth proportional to 20,849.04, 31,232.40 and 13,428 is: 20,115.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,849.04 : 31,232.40 = 13,428 : x
  2. Step 2: Convert to fraction form
    20,849.04/31,232.40 = 13,428/x
  3. Step 3: Cross multiply
    20,849.04x = 31,232.40 × 13,428
  4. Step 4: Simplify right side
    20,849.04x = 419,388,667.20
  5. Step 5: Solve for x
    x = 419,388,667.20/20,849.04
  6. Step 6: Final answer
    x = 20,115.49

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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.