Home / 12,020.20-18,030.36-7,886.38

Finding the Fourth Proportional to 12,020.20, 18,030.36 and 7,886.38

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Solution

The fourth proportional to 12,020.20, 18,030.36 and 7,886.38 is: 11,829.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,020.20 : 18,030.36 = 7,886.38 : x
  2. Step 2: Convert to fraction form
    12,020.20/18,030.36 = 7,886.38/x
  3. Step 3: Cross multiply
    12,020.20x = 18,030.36 × 7,886.38
  4. Step 4: Simplify right side
    12,020.20x = 142,194,270.50
  5. Step 5: Solve for x
    x = 142,194,270.50/12,020.20
  6. Step 6: Final answer
    x = 11,829.61

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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.