Home / 20,669.28-30,979.30-14,395.32

Finding the Fourth Proportional to 20,669.28, 30,979.30 and 14,395.32

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Solution

The fourth proportional to 20,669.28, 30,979.30 and 14,395.32 is: 21,575.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,669.28 : 30,979.30 = 14,395.32 : x
  2. Step 2: Convert to fraction form
    20,669.28/30,979.30 = 14,395.32/x
  3. Step 3: Cross multiply
    20,669.28x = 30,979.30 × 14,395.32
  4. Step 4: Simplify right side
    20,669.28x = 445,956,936.88
  5. Step 5: Solve for x
    x = 445,956,936.88/20,669.28
  6. Step 6: Final answer
    x = 21,575.83

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1.5x scale

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.