Home / 12,087.30-18,118.80-7,154.40

Finding the Fourth Proportional to 12,087.30, 18,118.80 and 7,154.40

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Solution

The fourth proportional to 12,087.30, 18,118.80 and 7,154.40 is: 10,724.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,087.30 : 18,118.80 = 7,154.40 : x
  2. Step 2: Convert to fraction form
    12,087.30/18,118.80 = 7,154.40/x
  3. Step 3: Cross multiply
    12,087.30x = 18,118.80 × 7,154.40
  4. Step 4: Simplify right side
    12,087.30x = 129,629,142.72
  5. Step 5: Solve for x
    x = 129,629,142.72/12,087.30
  6. Step 6: Final answer
    x = 10,724.41

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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.