Home / 12,087.79-18,120.74-4,294.78

Finding the Fourth Proportional to 12,087.79, 18,120.74 and 4,294.78

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Solution

The fourth proportional to 12,087.79, 18,120.74 and 4,294.78 is: 6,438.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,087.79 : 18,120.74 = 4,294.78 : x
  2. Step 2: Convert to fraction form
    12,087.79/18,120.74 = 4,294.78/x
  3. Step 3: Cross multiply
    12,087.79x = 18,120.74 × 4,294.78
  4. Step 4: Simplify right side
    12,087.79x = 77,824,524.96
  5. Step 5: Solve for x
    x = 77,824,524.96/12,087.79
  6. Step 6: Final answer
    x = 6,438.28

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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.