Home / 20,667.12-31,005.12-6,815.04

Finding the Fourth Proportional to 20,667.12, 31,005.12 and 6,815.04

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Solution

The fourth proportional to 20,667.12, 31,005.12 and 6,815.04 is: 10,224.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.12 : 31,005.12 = 6,815.04 : x
  2. Step 2: Convert to fraction form
    20,667.12/31,005.12 = 6,815.04/x
  3. Step 3: Cross multiply
    20,667.12x = 31,005.12 × 6,815.04
  4. Step 4: Simplify right side
    20,667.12x = 211,301,133.00
  5. Step 5: Solve for x
    x = 211,301,133.00/20,667.12
  6. Step 6: Final answer
    x = 10,224.02

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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.