Home / 12,109.20-18,162.90-5,087.40

Finding the Fourth Proportional to 12,109.20, 18,162.90 and 5,087.40

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Solution

The fourth proportional to 12,109.20, 18,162.90 and 5,087.40 is: 7,630.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,109.20 : 18,162.90 = 5,087.40 : x
  2. Step 2: Convert to fraction form
    12,109.20/18,162.90 = 5,087.40/x
  3. Step 3: Cross multiply
    12,109.20x = 18,162.90 × 5,087.40
  4. Step 4: Simplify right side
    12,109.20x = 92,401,937.46
  5. Step 5: Solve for x
    x = 92,401,937.46/12,109.20
  6. Step 6: Final answer
    x = 7,630.72

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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.