Home / 20,628.12-30,939.72-8,942.28

Finding the Fourth Proportional to 20,628.12, 30,939.72 and 8,942.28

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Solution

The fourth proportional to 20,628.12, 30,939.72 and 8,942.28 is: 13,412.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,628.12 : 30,939.72 = 8,942.28 : x
  2. Step 2: Convert to fraction form
    20,628.12/30,939.72 = 8,942.28/x
  3. Step 3: Cross multiply
    20,628.12x = 30,939.72 × 8,942.28
  4. Step 4: Simplify right side
    20,628.12x = 276,671,639.36
  5. Step 5: Solve for x
    x = 276,671,639.36/20,628.12
  6. Step 6: Final answer
    x = 13,412.35

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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.