Home / 12,154.20-18,231.30-8,020.50

Finding the Fourth Proportional to 12,154.20, 18,231.30 and 8,020.50

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Solution

The fourth proportional to 12,154.20, 18,231.30 and 8,020.50 is: 12,030.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,154.20 : 18,231.30 = 8,020.50 : x
  2. Step 2: Convert to fraction form
    12,154.20/18,231.30 = 8,020.50/x
  3. Step 3: Cross multiply
    12,154.20x = 18,231.30 × 8,020.50
  4. Step 4: Simplify right side
    12,154.20x = 146,224,141.65
  5. Step 5: Solve for x
    x = 146,224,141.65/12,154.20
  6. Step 6: Final answer
    x = 12,030.75

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Double scale
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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.