Home / 20,128.14-30,178.44-10,248.30

Finding the Fourth Proportional to 20,128.14, 30,178.44 and 10,248.30

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Solution

The fourth proportional to 20,128.14, 30,178.44 and 10,248.30 is: 15,365.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.14 : 30,178.44 = 10,248.30 : x
  2. Step 2: Convert to fraction form
    20,128.14/30,178.44 = 10,248.30/x
  3. Step 3: Cross multiply
    20,128.14x = 30,178.44 × 10,248.30
  4. Step 4: Simplify right side
    20,128.14x = 309,277,706.65
  5. Step 5: Solve for x
    x = 309,277,706.65/20,128.14
  6. Step 6: Final answer
    x = 15,365.44

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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.