Home / 12,087.80-18,102.90-7,422.20

Finding the Fourth Proportional to 12,087.80, 18,102.90 and 7,422.20

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Solution

The fourth proportional to 12,087.80, 18,102.90 and 7,422.20 is: 11,115.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,087.80 : 18,102.90 = 7,422.20 : x
  2. Step 2: Convert to fraction form
    12,087.80/18,102.90 = 7,422.20/x
  3. Step 3: Cross multiply
    12,087.80x = 18,102.90 × 7,422.20
  4. Step 4: Simplify right side
    12,087.80x = 134,363,344.38
  5. Step 5: Solve for x
    x = 134,363,344.38/12,087.80
  6. Step 6: Final answer
    x = 11,115.62

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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.