Home / 12,087.59-18,122.57-8,129.01

Finding the Fourth Proportional to 12,087.59, 18,122.57 and 8,129.01

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Solution

The fourth proportional to 12,087.59, 18,122.57 and 8,129.01 is: 12,187.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,087.59 : 18,122.57 = 8,129.01 : x
  2. Step 2: Convert to fraction form
    12,087.59/18,122.57 = 8,129.01/x
  3. Step 3: Cross multiply
    12,087.59x = 18,122.57 × 8,129.01
  4. Step 4: Simplify right side
    12,087.59x = 147,318,542.91
  5. Step 5: Solve for x
    x = 147,318,542.91/12,087.59
  6. Step 6: Final answer
    x = 12,187.58

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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.